Sea to Summit - Ultra-Sil Dry Sack, 20L / Grey
The Sea to Summit Ultra-Sil Dry Sack won the sought after Backpacker Editors' Choice award in 2006 and is still the ideal dry sack available for backpacking. Made with lightweight, waterproof 30D Ultra-Sil CORDURA brand fabric it's the perfect choice for modular packing to organize your gear inside your backpack like a pro. With an almost translucent look, visibility of contents is easy, and if you're really organized you'll make use of multiple color options to find things easier. Other features include a non-wicking Hypalon Roll-top closure, a round base for ease of packing and fully seam sealed for water resistance. An excellent choice for lightweight backpacking, cycle touring and travel.
The Sea to Summit Ultra-Sil Dry Sack won the sought after Backpacker Editors' Choice award in 2006 and is still the ideal dry sack available for backpacking. Made with lightweight, waterproof 30D Ultra-Sil CORDURA brand fabric it's the perfect choice for modular packing to organize your gear inside your backpack like a pro. With an almost translucent look, visibility of contents is easy, and if you're really organized you'll make use of multiple color options to find things easier. Other features include a non-wicking Hypalon Roll-top closure, a round base for ease of packing and fully seam sealed for water resistance. An excellent choice for lightweight backpacking, cycle touring and travel.
The Sea to Summit Ultra-Sil Dry Sack won the sought after Backpacker Editors' Choice award in 2006 and is still the ideal dry sack available for backpacking. Made with lightweight, waterproof 30D Ultra-Sil CORDURA brand fabric it's the perfect choice for modular packing to organize your gear inside your backpack like a pro. With an almost translucent look, visibility of contents is easy, and if you're really organized you'll make use of multiple color options to find things easier. Other features include a non-wicking Hypalon Roll-top closure, a round base for ease of packing and fully seam sealed for water resistance. An excellent choice for lightweight backpacking, cycle touring and travel.
The Sea to Summit Ultra-Sil Dry Sack won the sought after Backpacker Editors' Choice award in 2006 and is still the ideal dry sack available for backpacking. Made with lightweight, waterproof 30D Ultra-Sil CORDURA brand fabric it's the perfect choice for modular packing to organize your gear inside your backpack like a pro. With an almost translucent look, visibility of contents is easy, and if you're really organized you'll make use of multiple color options to find things easier. Other features include a non-wicking Hypalon Roll-top closure, a round base for ease of packing and fully seam sealed for water resistance. An excellent choice for lightweight backpacking, cycle touring and travel.
in 5 offers
The lowest price for Sea to Summit - Ultra-Sil Dry Sack, 20L / Grey right now is $22.32 at Woolworths, compared across 5 retailers.
The all-time low was $17.00 on 26 Dec 2023 — today's price is 31% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 11 Sept 2026.
Last updated at 11/09/2026 18:33:16
Sea to Summit Ultra-Sil Dry Bag 8 Litre - High Rise Grey
Delivery between 14–22 Sept $10
Ultra-Sil Dry Sack
Delivery $9.95
Sea to Summit - 8L Ultra-Sil Dry Bag - Grey
Delivery $14.95
Sea to Summit - 8L Ultra-Sil Dry Bag - Grey
Delivery $14.95
SEA TO SUMMIT Ultra-Sil Dry Bag High Rise Grey / 8L
Free delivery
originally posted on seatosummitusa.com
I had previously written a bad review regarding a two year old dry sack that was leaking. I assumed it was out of warranty. I have to say that S2S proactively reached out to me and asked for more details/pictures and ended up sending me a new dry sack. Based upon this world class customer service, I have changed my score to five stars. This is how to build a brand as I have since told this story to many folks. Great stuff and thank you S2S.
originally posted on seatosummitusa.com
Purchased two 2L drybags for my wife and I, to hold our smart phones, wallets, keys etc. We normally store our drybags in the day hatch of our Kayaks. While practicing our rolls, it’s understandable that some water will get into our day hatches. That’s expected. What wasn’t expected was that water got into my drybag, soaking my phone. Jury is still out on whether I’ll be able to get the phone back up and running. If not……$500 gone.After getting home I did a leak test on both bags. Filled them up with water to see if any would leak out. Unfortunately, both leaked like a sieve. These bags are NOT waterproof, as water permeated through the fabric, and not the seams. Totally disappointed with this product. Will not buy another. BTW, these drybags were only purchased 2 ... MorePurchased two 2L drybags for my wife and I, to hold our smart phones, wallets, keys etc. We normally store our drybags in the day hatch of our Kayaks. While practicing our rolls, it’s understandable that some water will get into our day hatches. That’s expected. What wasn’t expected was that water got into my drybag, soaking my phone. Jury is still out on whether I’ll be able to get the phone back up and running. If not……$500 gone.After getting home I did a leak test on both bags. Filled them up with water to see if any would leak out. Unfortunately, both leaked like a sieve. These bags are NOT waterproof, as water permeated through the fabric, and not the seams. Totally disappointed with this product. Will not buy another. BTW, these drybags were only purchased 2 months ago.
originally posted on llbean.com
I was enticed by the lightweight fabric, which would reduce the weight in my luggage. I took the bag for field work in a remote tropical location, and the plastic rods on the buckles fell off on the first day I used it. Then I was left with no dry bag and no place to purchase one. Truly unhappy about this experience. I urge you not to buy it. I can't believe the low quality in an item LL Bean sells. What happened to this company?
| Hand Orientation | Left/Right |
| Style | Round |
| Season | 4 |
| Sport | Boating |
| Included Components | dry sack |
Sea to Summit Ultra-Sil Dry Bag 8 Litre - High Rise Grey
Delivery between 14–22 Sept $10
Ultra-Sil Dry Sack
Delivery $9.95
Sea to Summit - 8L Ultra-Sil Dry Bag - Grey
Delivery $14.95
Sea to Summit - 8L Ultra-Sil Dry Bag - Grey
Delivery $14.95
SEA TO SUMMIT Ultra-Sil Dry Bag High Rise Grey / 8L
Free delivery
I had previously written a bad review regarding a two year old dry sack that was leaking. I assumed it was out of warranty. I have to say that S2S proactively reached out to me and asked for more details/pictures and ended up sending me a new dry sack. Based upon this world class customer service, I have changed my score to five stars. This is how to build a brand as I have since told this story to many folks. Great stuff and thank you S2S.
Purchased two 2L drybags for my wife and I, to hold our smart phones, wallets, keys etc. We normally store our drybags in the day hatch of our Kayaks. While practicing our rolls, it’s understandable that some water will get into our day hatches. That’s expected. What wasn’t expected was that water got into my drybag, soaking my phone. Jury is still out on whether I’ll be able to get the phone back up and running. If not……$500 gone.After getting home I did a leak test on both bags. Filled them up with water to see if any would leak out. Unfortunately, both leaked like a sieve. These bags are NOT waterproof, as water permeated through the fabric, and not the seams. Totally disappointed with this product. Will not buy another. BTW, these drybags were only purchased 2 ... MorePurchased two 2L drybags for my wife and I, to hold our smart phones, wallets, keys etc. We normally store our drybags in the day hatch of our Kayaks. While practicing our rolls, it’s understandable that some water will get into our day hatches. That’s expected. What wasn’t expected was that water got into my drybag, soaking my phone. Jury is still out on whether I’ll be able to get the phone back up and running. If not……$500 gone.After getting home I did a leak test on both bags. Filled them up with water to see if any would leak out. Unfortunately, both leaked like a sieve. These bags are NOT waterproof, as water permeated through the fabric, and not the seams. Totally disappointed with this product. Will not buy another. BTW, these drybags were only purchased 2 months ago.
I was enticed by the lightweight fabric, which would reduce the weight in my luggage. I took the bag for field work in a remote tropical location, and the plastic rods on the buckles fell off on the first day I used it. Then I was left with no dry bag and no place to purchase one. Truly unhappy about this experience. I urge you not to buy it. I can't believe the low quality in an item LL Bean sells. What happened to this company?
I bought a number of these dry bags in different sizes and colors. I just got off a river in the Arctic National Wildlife Refuge and it rained every day, except ONE! I was rafting and used a large, tough dry bag, lined with a large Ultra Sil dry sac ... then organized my gear into these smaller bags. I have found that redundancy in the field is a good thing! It was so nice to reach in and grab a bag, knowing what was inside!!! All my clothing and gear that needed to stay dry DID. As I pulled individual Ultra Sil Dry Bags out for different items, the other things in my pack stayed dry. Organization and dryness - what more could I ask for!One thing I noticed is that I don't need as large a dry bag as I thought I did, as you can compress items, and save space. For ... MoreI bought a number of these dry bags in different sizes and colors. I just got off a river in the Arctic National Wildlife Refuge and it rained every day, except ONE! I was rafting and used a large, tough dry bag, lined with a large Ultra Sil dry sac ... then organized my gear into these smaller bags. I have found that redundancy in the field is a good thing! It was so nice to reach in and grab a bag, knowing what was inside!!! All my clothing and gear that needed to stay dry DID. As I pulled individual Ultra Sil Dry Bags out for different items, the other things in my pack stayed dry. Organization and dryness - what more could I ask for!One thing I noticed is that I don't need as large a dry bag as I thought I did, as you can compress items, and save space. For their intended purpose, these Ultra Sil Dry Bags hold up very well. You will always want to protect them with a heavier weight, sturdy bag on the outside. Also, very light! Great product.
Is anything completely waterproof? This bag isn't, but it's not bad either.I'm grateful to Sea to Summit for sending me the item at no cost to me in exchange for an honest review of the item. So I decide to put it through some tough testing. I'm really curious about the claim of being "waterproof" that is so prominent on the label.I started with two very tough tests on this bag: I filled the bag full of wadded up paper and some socks, then sealed it up and sunk it in a sink and let it sit overnight. The next morning I checked it out and the paper had beome somewhat wet.The second test I stuffed it completely full of paper and sealed it up agaain. After I put it in the sink, I could squeze air out of it--which tells me if air can get out, then water can probably ... MoreIs anything completely waterproof? This bag isn't, but it's not bad either.I'm grateful to Sea to Summit for sending me the item at no cost to me in exchange for an honest review of the item. So I decide to put it through some tough testing. I'm really curious about the claim of being "waterproof" that is so prominent on the label.I started with two very tough tests on this bag: I filled the bag full of wadded up paper and some socks, then sealed it up and sunk it in a sink and let it sit overnight. The next morning I checked it out and the paper had beome somewhat wet.The second test I stuffed it completely full of paper and sealed it up agaain. After I put it in the sink, I could squeze air out of it--which tells me if air can get out, then water can probably get in. I let it sit for several hours and came back. All of the paper was soaked and there was about a cup of water inside the bag.Maybe I'm expecting too much from the product. Maybe I'm not sealing it properly. Both are possibilities.On the sealing up of the bag: I was disappointed that the instructions were on the reverse side needed to follow them easily. If the instructions were on the other side of the bag, then the picture in the instructions would match the bag as you hold it--but it's not that way. The picture is on the opposite side so you have to look at the picture in the bag and then reverse it in your mind to seal it up right.For a third test, I decided to fill the bag up with water and seal it up, then put it in a large bowl (upside down) and let it sit for 1 hour. I would then see how much water leaked out. If it's going to keep water out, it also needs to keep water in. As I had feared, after one hour there was a good amount of leakage--nearly 1/2 a cup (100 ml) had drained out. Which means it could also drain in.I consider the possiblity that I'm doing it wrong--that's always something to consider! So I watch a few online videos. One recommends putting five to six folds in the top, another recommends putting your gear inside a plastic garbage bag and then putting that bag inside the dry bag. A third video doesn't tell me anything.So for my next test, I stuff with paper again, squeeze the air out, and put six rolls in the top. I toss it in the shower for 15 minutes to simulate a rainstorm. After 15 minutes I pull it out and the paper is wet--not soaked completely, but plainly wet. Certainly "dryer" than if I had put the paper in the shower without the bag at all--but the stuff's still very wet. It's at this point I think to myself that if I had actually paid for this product I'd take it back for a refund.I set up one final test: A bag in a bag. I get a common household garbage bag and stuff it in the dry bag, then stuff the garbage bag with paper. I then tie the garbage bag to stuf in the dry bag, and seal the dry bag as instructed. I then place it in a vessel of water to see how it performs.Immedaitely I find out that there is a good amount of air trapped in the garbage bag that I can't really "press out" easily and it is clumsy to work through. I do my best, but a good amount of air is trapped in the dry bag. I also wonder what happens in the field when I want to get at my gear in the bag and then re-close the bag--does the garbage bag survive being opened and closed multiple times.The final results of this test were that after two hours the inner garbage bag tied up DID keep everything inside of it dry, but the material between the garbabge bag and the dry bag had a good amount of moisture.I did not complete any tests on the strenght of the dry bag, but it does appear to be sturdy and durable. It certainly stands up to basic use without tearing, unlike a garbage bag alone.Good points:1) It collapses down very small and makes for a very nice container for water. I'm pretty good at bushcraft, but it's kind of hard to make a "bucket" out in the field.2) It keeps stuff "mostly dry" -- better than nothing at all.3) It is easy to open and close.4) It is easy to pack and unpack.5) Because air tends to get trapped in the bag, most of the time as regular pack of gear will float in water.6) If a buckle breaks, it can be replaced -- although I not test that feature.Not-so-good points:1) It isn't waterproof.2) It can trap air and become bulky to pack (although this leads to good point #5 above).3) The buckling system of rolling then buckling is awkward and takes up space in the pack.Conclusions:It's better than nothing, and coupled with a secondary bag such as a garbage bag, it can be a useful tool on trips where you expect the peril of extreme water--kayak, canoe, or rainforest hiking. I wouldn't trust it alone to keep gear dry--especially electornics gear. However, I'll use it on such trips because that coupled with a secondary bag is really just about the only hope you have--alternatives are just not available.I'm not saying I wouldn't use it--I am saying that i wouldn't use it by itself and expect it to keep the contents completely dry. It says it's waterproof, but it isn't.PLUS: A number of the reviews here are showing total success in keeping gear dry, and that is consistent with reviews on other websites. There may be tips and tricks that I have missed.
I was astounded at how light this bag was. This is exceptionally thin material, is meant for clothing or non-electronic items that you want to keep dry or away from other items. It is not at all like the rubber-type dry bags that you may be used to and that weigh considerably more. The 8L size is still quite small. It would be ideal for packs where weight is an issue and will be very easy to carry when travelling. Not for keeping items dry on a boat. A very inventive item.
I bought two 20 liter sacs to replace older heavy duty vinyl ones. Much improved. Softer sides makes them easier to pack and white interior easier to find things. Light duty.Only trouble is one buckle came apart. Fortunately I noticed it and could reassemble on river. Tightened both bucks and no problems since.
The Big River Dry Bags are perfect for my canoe and kayak trips. SUP's too. They are tough, water tight, durable and the tie down grommets make for a dry secure load. I bought several sizes and like them so much, bought more to give as gifts. Everyone loves them.I also bought several different size Lightweight Dry Sacks, and am just as happy with them. I do a lot of 2- 7 day overnight backpacking trips in Maine, New Hampshire & Vermont. The bags are used constantly.
We throw both of our medications, contacts, retainers, IDs, and keys in this bag, toss it in a backpack and hit the trail. It keeps everything dry in the rain and it rolls down into the perfect size for travel. Very versatile and lightweight…I love that I can fill it to the brim with stuff or collapse it down into almost nothing. I would absolutely reorder this bag in a heartbeat. Quality is solid, and bag weighs next to nothing.
Bought our first of these several years ago, then bought more. I wanted help getting organized while traveling. We use these often! The kids and I each carry a 4 L in our hiking bag (aka day pack). In one 4L, I carry emergency items I want to stay dry, like a hat, gloves, and scarf. I also carry a 2nd 4L, for med kit items like cremes, band aids, tweezers, knife, paracord, Farkel set (game), and walkie talkie. It's small enough to just leave packed and easily move it from one bag to another (for example, when we're hiking one day and on waterpark rides the next). For our kayaking 4L, I carry phone, an apple (the actual fruit :), paracord, tiny towel, several fruit snacks or fruit leather packages, and walkie talkie.Additionally, we each have a 20 L sack for dirty ... MoreBought our first of these several years ago, then bought more. I wanted help getting organized while traveling. We use these often! The kids and I each carry a 4 L in our hiking bag (aka day pack). In one 4L, I carry emergency items I want to stay dry, like a hat, gloves, and scarf. I also carry a 2nd 4L, for med kit items like cremes, band aids, tweezers, knife, paracord, Farkel set (game), and walkie talkie. It's small enough to just leave packed and easily move it from one bag to another (for example, when we're hiking one day and on waterpark rides the next). For our kayaking 4L, I carry phone, an apple (the actual fruit :), paracord, tiny towel, several fruit snacks or fruit leather packages, and walkie talkie.Additionally, we each have a 20 L sack for dirty clothes--these sacks seem to help keep the body odor contained, plus the roll top becomes a handy carry handle for laundry days on the road. (The sacks air out over time.) We camp in both hot and cold climates in one trip, but are limited on space, so I was delighted to discover that we can squish about 4-6 outfits of cold-weather items into one of these 20 L sacks by squishing out the air--works far better than those "space bags". As a side bar, I did try a 35 L bag, but found it too big for us--it is too big for backpacks, day packs, and suitcases. So thanks to these, our day packs are more organized, our big hiking backpacks are more organized, and dirty clothes' smells are contained. I will note that this model is the thicker material without the venting option. If you want the thinner material version, seek the nano. If you want venting, that's the eVent. I like the nano, but not the eVent. I like this series the best of all of them. Your results may vary. Oh, almost forgot to mention: we have also used a 20L on our kayak to hold two doublenest hammocks and extra fruit. I have used an 8 L for packable jacket, gloves, ski hat, scarf--had to roll them up pretty tightly, but they did fit. Hope these comments help you select a size that works for you.
| Hand Orientation | Left/Right |
| Style | Round |
| Season | 4 |
| Sport | Boating |
| Included Components | dry sack |
