Sea to Summit Spark 7C Down Sleeping Bag Long
Sea To Summit Spark 7C sleeping bag is the perfect sleeping bag if you are counting grams, but still want to ensure a fantastic night's sleep. Filled with RDS certified 850+ fillpower goose down treated with a PFC-free Ultra-Dry Down treatment, the Spark features a technical hood and a zipper protection tube to retain heat. Comfort is guaranteed by a super breathable 10 denier inner fabric, while a 10D structure with a PFC-free DWR treatment and a highly water-repellent fabric for the hood and bottom of the bag repels wind and condensation. The full-length zip model can be paired with a corresponding Spark for women for comfort that couples can share.
Sea To Summit Spark 7C sleeping bag is the perfect sleeping bag if you are counting grams, but still want to ensure a fantastic night's sleep. Filled with RDS certified 850+ fillpower goose down treated with a PFC-free Ultra-Dry Down treatment, the Spark features a technical hood and a zipper protection tube to retain heat. Comfort is guaranteed by a super breathable 10 denier inner fabric, while a 10D structure with a PFC-free DWR treatment and a highly water-repellent fabric for the hood and bottom of the bag repels wind and condensation. The full-length zip model can be paired with a corresponding Spark for women for comfort that couples can share.
Sea To Summit Spark 7C sleeping bag is the perfect sleeping bag if you are counting grams, but still want to ensure a fantastic night's sleep. Filled with RDS certified 850+ fillpower goose down treated with a PFC-free Ultra-Dry Down treatment, the Spark features a technical hood and a zipper protection tube to retain heat. Comfort is guaranteed by a super breathable 10 denier inner fabric, while a 10D structure with a PFC-free DWR treatment and a highly water-repellent fabric for the hood and bottom of the bag repels wind and condensation. The full-length zip model can be paired with a corresponding Spark for women for comfort that couples can share.
Sea To Summit Spark 7C sleeping bag is the perfect sleeping bag if you are counting grams, but still want to ensure a fantastic night's sleep. Filled with RDS certified 850+ fillpower goose down treated with a PFC-free Ultra-Dry Down treatment, the Spark features a technical hood and a zipper protection tube to retain heat. Comfort is guaranteed by a super breathable 10 denier inner fabric, while a 10D structure with a PFC-free DWR treatment and a highly water-repellent fabric for the hood and bottom of the bag repels wind and condensation. The full-length zip model can be paired with a corresponding Spark for women for comfort that couples can share.
in 16 offers
The lowest price for Sea to Summit Spark 7C Down Sleeping Bag Long right now is $399.99 at Summit Gear, compared across 16 retailers.
The all-time low was $359.91 on 25 Nov 2025 — today's price is 11% above the lowest ever. That's a little above the best price we've seen.
Prices last updated 8 June 2026.
Last updated at 08/06/2026 18:40:42
Sea to Summit Spark 7C Down Sleeping Bag
Free delivery between 11–19 June
Sea to Summit Spark 7C/45F - Sleeping bag
Delivery $129.31
Sea To Summit Spark Down Sleeping Bag Long / 7C/45F
Free delivery
Sea to Summit Spark Down Sleeping Bag 7C|45F - Long
Free delivery between Wed – Mon
Sea To Summit Spark 7C sleeping bag -Long
Delivery by 17 June $64.36
Sea to Summit Spark Down Sleeping Bag 7C|45F / Long
Delivery between 12–22 June $10.90
Sea To Summit Spark 7C Down Sleeping Bag Long
Free delivery
Sea to Summit Spark 7°C / 45°F Ultra Dry Down Sleeping Bag (Long Mummy) - Grey / Yellow
Free delivery between 11–19 June
Sea to Summit Spark Down Sleeping Bag Men's 7°C / Long
Free delivery
Sea to Summit Spark 7C Down Sleeping Bag (2024 New Version) Long
Delivery $30.83
originally posted on seatosummit.com
I received this sleeping bag from influenster in return for an honest review!We went camping in the sequoia national park, and I brought this sleeping bag to test it out! First of all it’s a nice looking sleeping bag, and it is very soft and light. It doesn’t take up a lot of space, and is easy to roll up and put away in the bag it comes in.I did sadly freeze in the night, but it was cold when we went, and was about to snow the day after, so I’d say this sleeping bag is more for a barn spring or summer use! I think this says to be good down to 7 C or like 45 F, but I think it was around 30s F when we were camping. I was wearing two blankets on top but was still cold on my back and toes and legs.I liked that the zipper is both reachable on the outside and the ... MoreI received this sleeping bag from influenster in return for an honest review!We went camping in the sequoia national park, and I brought this sleeping bag to test it out! First of all it’s a nice looking sleeping bag, and it is very soft and light. It doesn’t take up a lot of space, and is easy to roll up and put away in the bag it comes in.I did sadly freeze in the night, but it was cold when we went, and was about to snow the day after, so I’d say this sleeping bag is more for a barn spring or summer use! I think this says to be good down to 7 C or like 45 F, but I think it was around 30s F when we were camping. I was wearing two blankets on top but was still cold on my back and toes and legs.I liked that the zipper is both reachable on the outside and the inside of the bag, and that the head piece can be tightened a lot, I tightened it so only my mouth was sticking out, to try and keep warm. Also the bag is pretty roomy, I was able to sleep on my side in it!Overall it’s a great sleeping bag, you just have to be mindful of how cold it is where you’re going to camp!
originally posted on seatosummitusa.com
Wow! Blown away by how light this is! It folds down super small if you use the compression bag it comes with or the regular uncompressed back for normal storage. It’s a decent roomy size for a mummy bag that fit both myself and husband just fine without feeling too tight. The no snag zipper is a nice bonus feature along with the ability to synch in the hood/top part. The outer material is thin but has a coating on it that makes it more durable than expected. It warmed up quickly with body heat and I have no concerns about being cold within the approved temperature range. Would recommend and excited to get more use of this as camping season picks back up!
originally posted on seatosummitusa.com
The weight of this bag is awesome and if that is the most important factor then you should consider this bag (Spark 1). I have had this bag for 5 years now since purchasing it from REI. Overall I think it is best suited to cool nights around 50 degrees'ish regardless of it's 40 degree temp rating. I have paired it with thepaired it with a Therma-rest X-Therm and X-light over its life. The "Pros" are it's weight and compressibility. The "Cons" are that it sleeps cold for it's temperature rating, it fits super tight, the 1/3 zipper means you are either in or out (there is no venting or in-between measures), the zipper is of dubious quality, the baffles are large enough to allow down migration unless you meticulously re-fluff it every night, and over 5 years the "dry ... MoreThe weight of this bag is awesome and if that is the most important factor then you should consider this bag (Spark 1). I have had this bag for 5 years now since purchasing it from REI. Overall I think it is best suited to cool nights around 50 degrees'ish regardless of it's 40 degree temp rating. I have paired it with thepaired it with a Therma-rest X-Therm and X-light over its life. The "Pros" are it's weight and compressibility. The "Cons" are that it sleeps cold for it's temperature rating, it fits super tight, the 1/3 zipper means you are either in or out (there is no venting or in-between measures), the zipper is of dubious quality, the baffles are large enough to allow down migration unless you meticulously re-fluff it every night, and over 5 years the "dry down" coating has broken down.To expand on the above this has primarily been a summer bag. It works best when day and night temps are similar and cool. The best place I used it was in the Smokies above 5.5k feet with cool days and similar nights in the kate spring. You can crawl in to warm up and then the temperature is similar over night so you don't overheat or feel cold.However I also used this bag as my middle/late - spring and summer bag on my AT Thru-Hike attempt (with a liner) and really struggled with it when we had hot days and cool nights. I would find that I would start in the liner, then when that would get cold use the bag as a blanket, and then that would get cold get into the bag (with no zipper below the waist), then overheat and sweat, and then zip the bag up and be cold the rest of the night in a semi-wet bag. I tried multiple combinations of liner vs. no liner, light base layer vs full clothes, puffy vs no puffy, etc. In the end nothing was really comfortable, but I kept the bag because it was frankly lighter than anything else in its price and size range. It kept me alive down to 35'ish degrees F (never really comfortable), but warm above 45'ish degrees.Moving forward I will likely just spring for an enlightened equipment quilt - at a much higher price point. This bag is good for what it is and if you are on a budget and want something super lightweight it is a good bag. But with most ultralight things expect to suffer some loss of comfort for the loss of ounces.
| Variant | |
| size | Long |
| style | 7C/45F |
Sea to Summit Spark 7C Down Sleeping Bag
Free delivery between 11–19 June
Sea to Summit Spark 7C/45F - Sleeping bag
Delivery $129.31
Sea To Summit Spark Down Sleeping Bag Long / 7C/45F
Free delivery
Sea to Summit Spark Down Sleeping Bag 7C|45F - Long
Free delivery between Wed – Mon
Sea To Summit Spark 7C sleeping bag -Long
Delivery by 17 June $64.36
I received this sleeping bag from influenster in return for an honest review!We went camping in the sequoia national park, and I brought this sleeping bag to test it out! First of all it’s a nice looking sleeping bag, and it is very soft and light. It doesn’t take up a lot of space, and is easy to roll up and put away in the bag it comes in.I did sadly freeze in the night, but it was cold when we went, and was about to snow the day after, so I’d say this sleeping bag is more for a barn spring or summer use! I think this says to be good down to 7 C or like 45 F, but I think it was around 30s F when we were camping. I was wearing two blankets on top but was still cold on my back and toes and legs.I liked that the zipper is both reachable on the outside and the ... MoreI received this sleeping bag from influenster in return for an honest review!We went camping in the sequoia national park, and I brought this sleeping bag to test it out! First of all it’s a nice looking sleeping bag, and it is very soft and light. It doesn’t take up a lot of space, and is easy to roll up and put away in the bag it comes in.I did sadly freeze in the night, but it was cold when we went, and was about to snow the day after, so I’d say this sleeping bag is more for a barn spring or summer use! I think this says to be good down to 7 C or like 45 F, but I think it was around 30s F when we were camping. I was wearing two blankets on top but was still cold on my back and toes and legs.I liked that the zipper is both reachable on the outside and the inside of the bag, and that the head piece can be tightened a lot, I tightened it so only my mouth was sticking out, to try and keep warm. Also the bag is pretty roomy, I was able to sleep on my side in it!Overall it’s a great sleeping bag, you just have to be mindful of how cold it is where you’re going to camp!
Wow! Blown away by how light this is! It folds down super small if you use the compression bag it comes with or the regular uncompressed back for normal storage. It’s a decent roomy size for a mummy bag that fit both myself and husband just fine without feeling too tight. The no snag zipper is a nice bonus feature along with the ability to synch in the hood/top part. The outer material is thin but has a coating on it that makes it more durable than expected. It warmed up quickly with body heat and I have no concerns about being cold within the approved temperature range. Would recommend and excited to get more use of this as camping season picks back up!
The weight of this bag is awesome and if that is the most important factor then you should consider this bag (Spark 1). I have had this bag for 5 years now since purchasing it from REI. Overall I think it is best suited to cool nights around 50 degrees'ish regardless of it's 40 degree temp rating. I have paired it with thepaired it with a Therma-rest X-Therm and X-light over its life. The "Pros" are it's weight and compressibility. The "Cons" are that it sleeps cold for it's temperature rating, it fits super tight, the 1/3 zipper means you are either in or out (there is no venting or in-between measures), the zipper is of dubious quality, the baffles are large enough to allow down migration unless you meticulously re-fluff it every night, and over 5 years the "dry ... MoreThe weight of this bag is awesome and if that is the most important factor then you should consider this bag (Spark 1). I have had this bag for 5 years now since purchasing it from REI. Overall I think it is best suited to cool nights around 50 degrees'ish regardless of it's 40 degree temp rating. I have paired it with thepaired it with a Therma-rest X-Therm and X-light over its life. The "Pros" are it's weight and compressibility. The "Cons" are that it sleeps cold for it's temperature rating, it fits super tight, the 1/3 zipper means you are either in or out (there is no venting or in-between measures), the zipper is of dubious quality, the baffles are large enough to allow down migration unless you meticulously re-fluff it every night, and over 5 years the "dry down" coating has broken down.To expand on the above this has primarily been a summer bag. It works best when day and night temps are similar and cool. The best place I used it was in the Smokies above 5.5k feet with cool days and similar nights in the kate spring. You can crawl in to warm up and then the temperature is similar over night so you don't overheat or feel cold.However I also used this bag as my middle/late - spring and summer bag on my AT Thru-Hike attempt (with a liner) and really struggled with it when we had hot days and cool nights. I would find that I would start in the liner, then when that would get cold use the bag as a blanket, and then that would get cold get into the bag (with no zipper below the waist), then overheat and sweat, and then zip the bag up and be cold the rest of the night in a semi-wet bag. I tried multiple combinations of liner vs. no liner, light base layer vs full clothes, puffy vs no puffy, etc. In the end nothing was really comfortable, but I kept the bag because it was frankly lighter than anything else in its price and size range. It kept me alive down to 35'ish degrees F (never really comfortable), but warm above 45'ish degrees.Moving forward I will likely just spring for an enlightened equipment quilt - at a much higher price point. This bag is good for what it is and if you are on a budget and want something super lightweight it is a good bag. But with most ultralight things expect to suffer some loss of comfort for the loss of ounces.
I purchased the Spark 5 degree down bag and was excited at first. The bag weighed about an ounce less than the specifications, which was awesome until I looked closer. There is not enough down to have it spread out throughout the bag any any thickness. It has too many blank spots. Every time it is adjusted the down has to come from somewhere else. I suspect this bag was shorted on down. My other brand 25 degree bag is warmer. The zipper is very frustrating, it requires very specific angles to work and is very light duty, not much fun in the middle of the night. It is the wimpiest zipper I have ever seen on a sleeping bag. The bag is light and good to about 30 degrees compared to other bags.
As an avid hiker/backpacker, I have been wanting a sleeping bag that is super light to not weigh me down and small enough to not add too much bulk on my back. I have only heard good things from the Sea to Summit brand, so I was excited to try the 30-degree Spark Down Sleeping Bag. It came with a storage bag, a smaller compression bag, a clip, and a down certification paper with tons of interesting information about the down filling. It's amazing how compressed this sleeping bag can get, and it is so super lightweight! It didn't feel like any added weight at all when attached to my backpack! It zips down about halfway, so I had plenty of room to get in it. The zipper is smooth and seems very high quality. It is a mummy style bag, so it's meant to be snug in the ... MoreAs an avid hiker/backpacker, I have been wanting a sleeping bag that is super light to not weigh me down and small enough to not add too much bulk on my back. I have only heard good things from the Sea to Summit brand, so I was excited to try the 30-degree Spark Down Sleeping Bag. It came with a storage bag, a smaller compression bag, a clip, and a down certification paper with tons of interesting information about the down filling. It's amazing how compressed this sleeping bag can get, and it is so super lightweight! It didn't feel like any added weight at all when attached to my backpack! It zips down about halfway, so I had plenty of room to get in it. The zipper is smooth and seems very high quality. It is a mummy style bag, so it's meant to be snug in the footboard area. However, I had plenty of room for my feet and legs to move around. I was afraid it would feel too restrictive for my liking, but that wasn't the case at all. I could move my legs to be about shoulder width apart. The hood cinches, which helps with warmth as well. For context, I am a 5 ft 5 in female that weighs 135 pounds, so I can see this working for a variety of people given how much extra room I had. As far as comfort, I can't even describe how pleasant this bag feels. My words when I first got in was, "Wow, this feels like liquid gold surrounding my body!" That's the only words that came to mind, but it's the best feeling material I have ever felt! It's truly amazing and makes me want to use it in my bed every night! Even though it's extremely soft, it also seems like a high-quality shell that will withstand several seasons of camping. As far as warmth, I took it outside on a cold night, about 35 degrees, just to test it out. I was still warm after quite a few minutes, so I think the 30-degree rating is spot on. Overall, I am extremely happy with this sleeping bag and totally recommend it to anyone looking to prioritize comfort, warmth, and lightweight material!
Spark sleeping bag had a musky odour, partially a chemical like smell that prevented me from sleeping well. I don't understand why since it's brand new. I've used other down sleeping bags, some as old as 20yrs and it doesn't smell.Customer service is non existent.After informing Sea to Summit with no reply in 5days I just did a refund. It's been 3 weeks now and they still haven't replied but my return is sent out.Warmth wise- I'm someone that gets cold very easily, in 12ºC this bag was barely warm enough. I use Thermarest on top of a cot so the pad was not the issue. Clothing was light wool pants with 3 layer wool shirts. Tent is 2person marmot crane creek, sleeping single.
This sleeping bag is high quality! You can tell Sea to Summit has really spent time to get it right. I was surprised how big of a case it came in but, was happy to note that a more compact bag was included and it does shrink down easily. They are not joking when they say you will be comfortable down to 0F. As a 5’2 female, I have more than enough room to get cozy but not too much that there I do not feel snug. There are so many great features like the pillows near the hood for support, clasps to ensure much of your face is protected and the ability to zip two together. Would for sure recommend to my other outdoorsy friends. I would say this is not “over”engineered but perfect for my use. This ensures it is not too heavy to take with me on my trips.
Our family has owned several sleeping bags throughout the years but the quality of all of them combined does not even come close to the quality of this Sea to Summit sleeping bag!With a mummy shape designed for a woman, it contours to my body leaving no room for cold air to make its way inside. The zippers are snag proof and the water repelling nylon fabric is soft, smooth, and breathable. (I still plan to purchase one of their silk-blend liners to keep the bag clean inside.)It’s incredibly lightweight- easy to fold, carry, and store; perfect for backpacking. Despite its weight, the 850+ PFC free ultra-dry down fill keeps you warm in 15°F freezing temperatures.In the past, I never would have considered spending over $500 on a sleeping bag until I received this ... MoreOur family has owned several sleeping bags throughout the years but the quality of all of them combined does not even come close to the quality of this Sea to Summit sleeping bag!With a mummy shape designed for a woman, it contours to my body leaving no room for cold air to make its way inside. The zippers are snag proof and the water repelling nylon fabric is soft, smooth, and breathable. (I still plan to purchase one of their silk-blend liners to keep the bag clean inside.)It’s incredibly lightweight- easy to fold, carry, and store; perfect for backpacking. Despite its weight, the 850+ PFC free ultra-dry down fill keeps you warm in 15°F freezing temperatures.In the past, I never would have considered spending over $500 on a sleeping bag until I received this one as a gift in exchange for my review. I’ve since ordered a regular one for my hubby.
Super light, strong, soft and just warm enough for Florida; temperature may change quickly in Florida, and still, it only gets pretty cold at the end and beginning of every year; and sometimes our (cold) Winter (60's degrees) is only 2 weeks long! Lemme' tell you, after taking the Spark Sp sleeping bag camping a few times around South Florida, I tell you this sleeping bag is designed for warm weather places; it's very light, almost cloud-soft light; the insulation is extremely thin and very well distributed and I hope such thin insulation lasts, because the softness of the bag has made me sleep in it, even when I was at home (just to test my new camping tent, and this sleeping bag); Jokes aside, I moved furniture around my living room and set up my new camping tent ... MoreSuper light, strong, soft and just warm enough for Florida; temperature may change quickly in Florida, and still, it only gets pretty cold at the end and beginning of every year; and sometimes our (cold) Winter (60's degrees) is only 2 weeks long! Lemme' tell you, after taking the Spark Sp sleeping bag camping a few times around South Florida, I tell you this sleeping bag is designed for warm weather places; it's very light, almost cloud-soft light; the insulation is extremely thin and very well distributed and I hope such thin insulation lasts, because the softness of the bag has made me sleep in it, even when I was at home (just to test my new camping tent, and this sleeping bag); Jokes aside, I moved furniture around my living room and set up my new camping tent and I slept in it in this sleeping bag for a few days... a couple of weeks, to be more precise; I tested this sleeping bag (using my air conditioner at 69 degrees) to get used to it and because it is 'so' light, it feels flimsy! so far, after about 10 camping weekend trips, it shows no damage at all; I treat my things accordingly, so treating this sleeping bag with a bit of care will make it last for a while; also, I bought the bigger size (this bag is sold in 2 sizes) even though my size is the smaller one, and I did it just in case I need the extra space to help keep something warm, like a pet or an item I must keep close to me (or if I want to wrap myself like a burrito). This bag is awesome!
This is a very WARM sleeping bag. It is not for mild weather, it is so warm. BUT, it is GREAT for very cool to cold weather. It is VERY LIGHTWEIGHT, and compresses down very small. However, the compression bag that comes with it, it is so small to begin with that it makes it hard to get the bag all in there. So, I bought another compression bag to do away with that frustration. I do not like that the zipper does not go all the way to the end, but leaves about an 18" toe box. It would be nice if it went to the end, so I could use it more for a blanket in mild weather. I like that it came with a breathable storage bag. Quality is very good. I am 6 feet tall and 175lbs and fit great in it. Overall it is a GREAT sleeping bag, just at the price point, I want it to be ... MoreThis is a very WARM sleeping bag. It is not for mild weather, it is so warm. BUT, it is GREAT for very cool to cold weather. It is VERY LIGHTWEIGHT, and compresses down very small. However, the compression bag that comes with it, it is so small to begin with that it makes it hard to get the bag all in there. So, I bought another compression bag to do away with that frustration. I do not like that the zipper does not go all the way to the end, but leaves about an 18" toe box. It would be nice if it went to the end, so I could use it more for a blanket in mild weather. I like that it came with a breathable storage bag. Quality is very good. I am 6 feet tall and 175lbs and fit great in it. Overall it is a GREAT sleeping bag, just at the price point, I want it to be perfect (zipper not going down all the way and compression bag), but I think it may be as close to perfect as I can get. If you can afford it, it is definitely worth it.
| Variant | |
| size | Long |
| style | 7C/45F |
