Osprey AETHER 55 Deep Water Blue backpack Customizable Comfortable Sustainable SIZE GUIDE The hiking backpack AETHER 55 by Opsrey is available at Speck-Sports. Little brother of the Aether Plus range, this Aether 55 offers you a large volume for your long mountain outings. Who says big volume, says necessarily more important load, that's why Osprey thought to equip you with many adjustment options to offer you the most comfortable backpack possible. There are adjustable straps and a Fit-on-the-Fly belt as well as the possibility to adjust the length of your back. The Airscape back panel with EVA foam padding provides a breathable and comfortable design. The main compartment is accessible through three accesses, from the top, the bottom or through a U-shaped front case opening. With a removable divider, this large compartment can be divided in two. Thus the bottom opening will give you access to the lower compartment. On the storage side, the Aether 55 will allow you to store all your gear: double zippered pockets in the top flap, front tote pocket, mesh side pockets with double access, baton holder, two zippered pockets in the abdominal belt, twin ice axe buckles. To optimize storage, the Aether 55 is also equipped with compression straps. Finally, the Aether 55 remains a highly functional and very well thought-out bag since it offers an integrated rain cover, a system for inserting the water pouch and even the possibility of attaching a Daylite model to the front for day trips. The AETHER 55 backpack by Osprey is designed for hikers looking for a backpack with a large volume, without neglecting comfort and durability.
Osprey AETHER 55 Deep Water Blue backpack Customizable Comfortable Sustainable SIZE GUIDE The hiking backpack AETHER 55 by Opsrey is available at Speck-Sports. Little brother of the Aether Plus range, this Aether 55 offers you a large volume for your long mountain outings. Who says big volume, says necessarily more important load, that's why Osprey thought to equip you with many adjustment options to offer you the most comfortable backpack possible. There are adjustable straps and a Fit-on-the-Fly belt as well as the possibility to adjust the length of your back. The Airscape back panel with EVA foam padding provides a breathable and comfortable design. The main compartment is accessible through three accesses, from the top, the bottom or through a U-shaped front case opening. With a removable divider, this large compartment can be divided in two. Thus the bottom opening will give you access to the lower compartment. On the storage side, the Aether 55 will allow you to store all your gear: double zippered pockets in the top flap, front tote pocket, mesh side pockets with double access, baton holder, two zippered pockets in the abdominal belt, twin ice axe buckles. To optimize storage, the Aether 55 is also equipped with compression straps. Finally, the Aether 55 remains a highly functional and very well thought-out bag since it offers an integrated rain cover, a system for inserting the water pouch and even the possibility of attaching a Daylite model to the front for day trips. The AETHER 55 backpack by Osprey is designed for hikers looking for a backpack with a large volume, without neglecting comfort and durability.
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Osprey Aether 55 Deep Water Blue L/XL
Osprey AETHER 55 Deep Water Blue backpack Customizable Comfortable Sustainable SIZE GUIDE The hiking backpack AETHER 55 by Opsrey is available at Speck-Sports. Little brother of the Aether Plus range, this Aether 55 offers you a large volume for your long mountain outings. Who says big volume, says necessarily more important load, that's why Osprey thought to equip you with many adjustment options to offer you the most comfortable backpack possible. There are adjustable straps and a Fit-on-the-Fly belt as well as the possibility to adjust the length of your back. The Airscape back panel with EVA foam padding provides a breathable and comfortable design. The main compartment is accessible through three accesses, from the top, the bottom or through a U-shaped front case opening. With a removable divider, this large compartment can be divided in two. Thus the bottom opening will give you access to the lower compartment. On the storage side, the Aether 55 will allow you to store all your gear: double zippered pockets in the top flap, front tote pocket, mesh side pockets with double access, baton holder, two zippered pockets in the abdominal belt, twin ice axe buckles. To optimize storage, the Aether 55 is also equipped with compression straps. Finally, the Aether 55 remains a highly functional and very well thought-out bag since it offers an integrated rain cover, a system for inserting the water pouch and even the possibility of attaching a Daylite model to the front for day trips. The AETHER 55 backpack by Osprey is designed for hikers looking for a backpack with a large volume, without neglecting comfort and durability.
Osprey AETHER 55 Deep Water Blue backpack Customizable Comfortable Sustainable SIZE GUIDE The hiking backpack AETHER 55 by Opsrey is available at Speck-Sports. Little brother of the Aether Plus range, this Aether 55 offers you a large volume for your long mountain outings. Who says big volume, says necessarily more important load, that's why Osprey thought to equip you with many adjustment options to offer you the most comfortable backpack possible. There are adjustable straps and a Fit-on-the-Fly belt as well as the possibility to adjust the length of your back. The Airscape back panel with EVA foam padding provides a breathable and comfortable design. The main compartment is accessible through three accesses, from the top, the bottom or through a U-shaped front case opening. With a removable divider, this large compartment can be divided in two. Thus the bottom opening will give you access to the lower compartment. On the storage side, the Aether 55 will allow you to store all your gear: double zippered pockets in the top flap, front tote pocket, mesh side pockets with double access, baton holder, two zippered pockets in the abdominal belt, twin ice axe buckles. To optimize storage, the Aether 55 is also equipped with compression straps. Finally, the Aether 55 remains a highly functional and very well thought-out bag since it offers an integrated rain cover, a system for inserting the water pouch and even the possibility of attaching a Daylite model to the front for day trips. The AETHER 55 backpack by Osprey is designed for hikers looking for a backpack with a large volume, without neglecting comfort and durability.
The all-time low was $223.01 on 24 July 2025 — today's price is 68% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 10 Nov 2026.
Last updated at 10/11/2026 20:15:35
Osprey Aether 55 Men's Backpack Deep Water Blue / L/XL
Free delivery
originally posted on REI
I bought this pack a couple weeks ago to use as my winter pack here in the White Mountains of NH. My typical daypack is a stratos 24 from Osprey from over a decade ago, and this new pack weighs the same but can carry more than dbl the load. My most recent trip was MtGarfield 4500' 32°F down low to -15°F WC summit temp with wet snow, sleet, and heavier snow- so frequent switching of layers was needed. The stash pocket in the front was great for a damp fleece and the shell that was on and off. Being able to unzip the main compartment from the side made it easier to access the down jacket for the summit.As for comfort.... after recieving the pack, i loaded it up and made the 3 adjustments this pack offers for a really comfortable trekking experience. It was like i ... MoreI bought this pack a couple weeks ago to use as my winter pack here in the White Mountains of NH. My typical daypack is a stratos 24 from Osprey from over a decade ago, and this new pack weighs the same but can carry more than dbl the load. My most recent trip was MtGarfield 4500' 32°F down low to -15°F WC summit temp with wet snow, sleet, and heavier snow- so frequent switching of layers was needed. The stash pocket in the front was great for a damp fleece and the shell that was on and off. Being able to unzip the main compartment from the side made it easier to access the down jacket for the summit.As for comfort.... after recieving the pack, i loaded it up and made the 3 adjustments this pack offers for a really comfortable trekking experience. It was like i wasn't even wearing the pack at all! The air space channels were nice keeping back sweat at a minimum, although it's almost impossible not to sweat on the steeper sections. The lumbar support is a new one for me and really is a game changer.The zippers are good, material rugged, but one con thus far is the rain cover. Although it has the cinching ability to cinch around the pack, there's no button or buckle to snap it together guaranteeing it won't blow off. Here in the Whites, winds on the summits and ridges are 50-85 mph on a daily basis. Osprey should add that security button or buckle. I went with a different Osprey pack cover that had this.Happy trails and fight for liberty.
originally posted on REI
First, The pack was sized by an REI Service professional. After that the pack has carried so much weight. I hike with a driftwood and rock collector, yep into the pack. We always are doing +800 elevation hikes, with her new collectables. The end of the day back is GREAT, hips are great, and she is happy. The bag cleans up from these collectables. This is great.
originally posted on REI
My Gossamer Gear Mariposa gave up the ghost midway through my 700-mile AT LASH last year and I picked up the Atmos as an emergency replacement, expecting it to be just tolerable. I found, being an older (66 at the time of this writing) hiker, that the comfort and padding of this pack make up for the extra weight. It fits snugly against your back and the hip belt works nicely.The size is deceptive - I was out for a month with it, often 5 days between town stops and it had plenty of space for a mid-size bear canister, my sleeping bag and clothes and 1 person tent inside. The brain on top (non-removable which is a minus) has two large pockets for things you need frequently. The water bottle pockets could be a little snugger - I use 1 liter seltzer bottles and if you ... MoreMy Gossamer Gear Mariposa gave up the ghost midway through my 700-mile AT LASH last year and I picked up the Atmos as an emergency replacement, expecting it to be just tolerable. I found, being an older (66 at the time of this writing) hiker, that the comfort and padding of this pack make up for the extra weight. It fits snugly against your back and the hip belt works nicely.The size is deceptive - I was out for a month with it, often 5 days between town stops and it had plenty of space for a mid-size bear canister, my sleeping bag and clothes and 1 person tent inside. The brain on top (non-removable which is a minus) has two large pockets for things you need frequently. The water bottle pockets could be a little snugger - I use 1 liter seltzer bottles and if you lean over, they can slip out. But all-in-all, this should be a good contender for a thru-hike pack.There are a lot of zippers and such on the pack. The minus is that these add weight, but the plus is that you can unzip the whole back of the pack which makes organization of your stuff really easy. There's a roomy (but not as roomy as my Mariposa :-( ) back pocket, good for more stuff you need quickly like water filter and #2 trowel.I was prepared to hate this pack, but I'm heading out for another 700 mile AT section this spring and looking forward to hiking with it.
| Load Range | 14 - 27 kg |
| S/M | 3356 IN³ / ⁵⁵ L |
| L/XL | 3539 IN³ / ⁵⁸ L |
Osprey Aether 55 Men's Backpack Deep Water Blue / L/XL
Free delivery
I bought this pack a couple weeks ago to use as my winter pack here in the White Mountains of NH. My typical daypack is a stratos 24 from Osprey from over a decade ago, and this new pack weighs the same but can carry more than dbl the load. My most recent trip was MtGarfield 4500' 32°F down low to -15°F WC summit temp with wet snow, sleet, and heavier snow- so frequent switching of layers was needed. The stash pocket in the front was great for a damp fleece and the shell that was on and off. Being able to unzip the main compartment from the side made it easier to access the down jacket for the summit.As for comfort.... after recieving the pack, i loaded it up and made the 3 adjustments this pack offers for a really comfortable trekking experience. It was like i ... MoreI bought this pack a couple weeks ago to use as my winter pack here in the White Mountains of NH. My typical daypack is a stratos 24 from Osprey from over a decade ago, and this new pack weighs the same but can carry more than dbl the load. My most recent trip was MtGarfield 4500' 32°F down low to -15°F WC summit temp with wet snow, sleet, and heavier snow- so frequent switching of layers was needed. The stash pocket in the front was great for a damp fleece and the shell that was on and off. Being able to unzip the main compartment from the side made it easier to access the down jacket for the summit.As for comfort.... after recieving the pack, i loaded it up and made the 3 adjustments this pack offers for a really comfortable trekking experience. It was like i wasn't even wearing the pack at all! The air space channels were nice keeping back sweat at a minimum, although it's almost impossible not to sweat on the steeper sections. The lumbar support is a new one for me and really is a game changer.The zippers are good, material rugged, but one con thus far is the rain cover. Although it has the cinching ability to cinch around the pack, there's no button or buckle to snap it together guaranteeing it won't blow off. Here in the Whites, winds on the summits and ridges are 50-85 mph on a daily basis. Osprey should add that security button or buckle. I went with a different Osprey pack cover that had this.Happy trails and fight for liberty.
First, The pack was sized by an REI Service professional. After that the pack has carried so much weight. I hike with a driftwood and rock collector, yep into the pack. We always are doing +800 elevation hikes, with her new collectables. The end of the day back is GREAT, hips are great, and she is happy. The bag cleans up from these collectables. This is great.
My Gossamer Gear Mariposa gave up the ghost midway through my 700-mile AT LASH last year and I picked up the Atmos as an emergency replacement, expecting it to be just tolerable. I found, being an older (66 at the time of this writing) hiker, that the comfort and padding of this pack make up for the extra weight. It fits snugly against your back and the hip belt works nicely.The size is deceptive - I was out for a month with it, often 5 days between town stops and it had plenty of space for a mid-size bear canister, my sleeping bag and clothes and 1 person tent inside. The brain on top (non-removable which is a minus) has two large pockets for things you need frequently. The water bottle pockets could be a little snugger - I use 1 liter seltzer bottles and if you ... MoreMy Gossamer Gear Mariposa gave up the ghost midway through my 700-mile AT LASH last year and I picked up the Atmos as an emergency replacement, expecting it to be just tolerable. I found, being an older (66 at the time of this writing) hiker, that the comfort and padding of this pack make up for the extra weight. It fits snugly against your back and the hip belt works nicely.The size is deceptive - I was out for a month with it, often 5 days between town stops and it had plenty of space for a mid-size bear canister, my sleeping bag and clothes and 1 person tent inside. The brain on top (non-removable which is a minus) has two large pockets for things you need frequently. The water bottle pockets could be a little snugger - I use 1 liter seltzer bottles and if you lean over, they can slip out. But all-in-all, this should be a good contender for a thru-hike pack.There are a lot of zippers and such on the pack. The minus is that these add weight, but the plus is that you can unzip the whole back of the pack which makes organization of your stuff really easy. There's a roomy (but not as roomy as my Mariposa :-( ) back pocket, good for more stuff you need quickly like water filter and #2 trowel.I was prepared to hate this pack, but I'm heading out for another 700 mile AT section this spring and looking forward to hiking with it.
I'm coming from a 65L REI co-op bag from 2012, which has been a great bag in its own right and served me well for many years as a beginner backpacker. My main problem with the 65 is for 3-4 days out, it's almost too much room. I'll never be able to resist the temptation to fill the extra space with nonsense, so I wanted to drop down in size and force myself into more efficiency.Anyway, on to the Osprey. I've been using this bag for two years now and it's been terrific. It's very feature heavy and all of the smart little details have allowed me to pack smart every time out. I'm a water bottle guy, but I like having the option for a hydration pack should I decide to use one. It's taken a little troubleshooting to dial in the exact settings my own comfort, but now ... MoreI'm coming from a 65L REI co-op bag from 2012, which has been a great bag in its own right and served me well for many years as a beginner backpacker. My main problem with the 65 is for 3-4 days out, it's almost too much room. I'll never be able to resist the temptation to fill the extra space with nonsense, so I wanted to drop down in size and force myself into more efficiency.Anyway, on to the Osprey. I've been using this bag for two years now and it's been terrific. It's very feature heavy and all of the smart little details have allowed me to pack smart every time out. I'm a water bottle guy, but I like having the option for a hydration pack should I decide to use one. It's taken a little troubleshooting to dial in the exact settings my own comfort, but now that it's locked in it feels like wearing nothing at all (nedflanders.gif).One major advantage to this bag is the ability to pack vertically. The main compartment allows for a lot of up and down room, which gives a lot of options to balance your weight perfectly. With most of my pack weight distributed upward instead of outward, it's really been better on my back.The top pouch is quite large and useful for your small odds and ends you don't want swimming around in your main compartment, and if your forecast doesn't call for rain you can ditch the rain fly and get even more space to collect trinkets like a friendly raven.The shoulder and waist straps are quite comfortable, although I'll concede the buckles for the waist feel a little cheap compared to the rest of the bag. Also, there is a LOT of extra strap at every adjustment point. Obviously that's good for accommodating all body sizes, but it's still a bit excessive when you're in the woods trailing more tassels than the Ultimate Warrior.All in all, it's a great pack at a solid price with very few smaller shortcomings. It's not the lightest thing in the world, but it's still decent and that added weight comes in the form of features you'll be happy to have. I can see having this for another 8-10 years until I buy whatever the next generation version happens to be.
Hiked 2 days with this on the AT with 27 pounds total weight and went 11.5 miles no problem - could have easily done 15 miles, but this was a shakedown trip for me. What I liked about it was the extra lumbar support, it was like have a comfy chair for my back. I almost didn't buy this because of all the hype about lighter backpacks, but REI didn't have the lighter one I was looking for and this one seemed to fit me great so I gave it a try. It's a couple pounds heavier, but I now have great confidence that this pack can carry the extra weight. comfortably.
This is my first true backpacking pack so I don't have much to compare this to, but it seems great! Plenty of adjustment options to get the perfect fit. High quality material and zippers. Seams all appear to be strong. Looking forward to many great trips with it!
Fantastic rucksack. Build quality is superb and the range of adjustability is exemplary, not only for back length but with the hip belt and side straps. Plenty of options for packing kit with loads of useful features and a good size for all year round trips. Many thanks for an excellent product, highly recommended.
The osprey was exactly what I needed with the adjustments in the hip lumbar and shoulders it took a lot of pressure off of my shoulders and transferred it better to the hips and balanced it better. The quality the look everything was just top notch. I have the north face terra 55 but just seemed there wasn’t as many adjustments as the osprey. Now I know what all the hype is about with osprey.
Used this for a few day cabin stay in the Rockies, including day hikes (lightly loaded) during the days and a good 11 km hike out (stuffed). It was very comfortable and stable at all times thanks to the adjustability and great overall suspension design. If packing a tent and stove a slightly larger bag would be a bit better.
Perfect pack for a weekend getaway. Had to use my girlfriends osprey 32L to hold our food and extra clothes but this pack was used for all camping and cooking necessities! Had a sleeping pad and bag inside, with a lot of cooking utensils, a couple spare of clothes, my tent attached outside and a few hand tools.
| Load Range | 14 - 27 kg |
| S/M | 3356 IN³ / ⁵⁵ L |
| L/XL | 3539 IN³ / ⁵⁸ L |
