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.
Last updated at 05/14/2026 06:33:37
Sea To Summit Ultra-Sil Waterproof Dry Storage Travel Sack Bag, 1L / Grey
Delivery $11.99
Ultra-Sil Dry Sack
Delivery $9.95
originally posted on seatosummitusa.com
These Ultra Sil dry sacks are lightweight and very robust. Not as light as the Nano’s but far from heavy. I’ve used these bags to keep my stuff dry in my backpack and they work!! Waaaaay better than plastic zipper bags and plastic trash bags. I bought several different sizes in different colors to help organize my gear better. No regrets here. Highly recommend these dry sacks.
originally posted on seatosummitusa.com
I now use this as my main interior sack instead of a pack liner. It's not only useful to stay organized, but it's so much better than using the noisy plastic pack liner, especially when you are packing up and getting out of camp quietly. It's much faster compared to struggling with a plastic pack liner too, as the ultra sil just slips right into my 55L backpack easily. The dry sack does exactly what it does, and I haven't had an issue with moisture leaking inside.
originally posted on seatosummitusa.com
HEADS UP - this isn't the kindest review courtesy of my lack of sleep. I hope this comes as helpful critique that ensures the future implementation of customer design is the highest quality possible but I'm sure with my current position and short fuse this is going to be a rough read.After 6 nights on this pad I hate this product and cannot stand to take it on the AT or any future adventure. I know y'all put great effort into the engineering but by God this is the worst mat I've ever slept on. I prefer to sleep on the tent floor.The sheer noise it makes was enough to have woken up my fellow campers and the lack of traction on it creates such an uncomfortable balancing act just to stay onboard the mat I felt I was riding a lubed up surfboard on a gliding magic ... MoreHEADS UP - this isn't the kindest review courtesy of my lack of sleep. I hope this comes as helpful critique that ensures the future implementation of customer design is the highest quality possible but I'm sure with my current position and short fuse this is going to be a rough read.After 6 nights on this pad I hate this product and cannot stand to take it on the AT or any future adventure. I know y'all put great effort into the engineering but by God this is the worst mat I've ever slept on. I prefer to sleep on the tent floor.The sheer noise it makes was enough to have woken up my fellow campers and the lack of traction on it creates such an uncomfortable balancing act just to stay onboard the mat I felt I was riding a lubed up surfboard on a gliding magic carpet underneath me (Not the best analogy but bear with me and my lack of any sleep).Suggestions: (a) either impose a full coat of more traction holding fabric along the entire surface or (b) patches/lines of far more tractive force creating material in a pattern throughout the pad.All in all, I regret buying this twice for my wife & I - we both desperately want to return these things but have passed your 60 day return policy as we ordered it while abroad and the biggest regret I have is having to now deal with reselling it on FB Marketplace.I apologize for the rant but it is an honest review and again, I hope it helps with future designs.
| Hand Orientation | Left/Right |
| Season | 4 |
| Sport | Camping & Hiking |
| Included Components | dry sack |
| Product dimensions | 23.88 x 10.92 x 10.92 cm; 14.17 Grams |
Sea To Summit Ultra-Sil Waterproof Dry Storage Travel Sack Bag, 1L / Grey
Delivery $11.99
Ultra-Sil Dry Sack
Delivery $9.95
These Ultra Sil dry sacks are lightweight and very robust. Not as light as the Nano’s but far from heavy. I’ve used these bags to keep my stuff dry in my backpack and they work!! Waaaaay better than plastic zipper bags and plastic trash bags. I bought several different sizes in different colors to help organize my gear better. No regrets here. Highly recommend these dry sacks.
I now use this as my main interior sack instead of a pack liner. It's not only useful to stay organized, but it's so much better than using the noisy plastic pack liner, especially when you are packing up and getting out of camp quietly. It's much faster compared to struggling with a plastic pack liner too, as the ultra sil just slips right into my 55L backpack easily. The dry sack does exactly what it does, and I haven't had an issue with moisture leaking inside.
HEADS UP - this isn't the kindest review courtesy of my lack of sleep. I hope this comes as helpful critique that ensures the future implementation of customer design is the highest quality possible but I'm sure with my current position and short fuse this is going to be a rough read.After 6 nights on this pad I hate this product and cannot stand to take it on the AT or any future adventure. I know y'all put great effort into the engineering but by God this is the worst mat I've ever slept on. I prefer to sleep on the tent floor.The sheer noise it makes was enough to have woken up my fellow campers and the lack of traction on it creates such an uncomfortable balancing act just to stay onboard the mat I felt I was riding a lubed up surfboard on a gliding magic ... MoreHEADS UP - this isn't the kindest review courtesy of my lack of sleep. I hope this comes as helpful critique that ensures the future implementation of customer design is the highest quality possible but I'm sure with my current position and short fuse this is going to be a rough read.After 6 nights on this pad I hate this product and cannot stand to take it on the AT or any future adventure. I know y'all put great effort into the engineering but by God this is the worst mat I've ever slept on. I prefer to sleep on the tent floor.The sheer noise it makes was enough to have woken up my fellow campers and the lack of traction on it creates such an uncomfortable balancing act just to stay onboard the mat I felt I was riding a lubed up surfboard on a gliding magic carpet underneath me (Not the best analogy but bear with me and my lack of any sleep).Suggestions: (a) either impose a full coat of more traction holding fabric along the entire surface or (b) patches/lines of far more tractive force creating material in a pattern throughout the pad.All in all, I regret buying this twice for my wife & I - we both desperately want to return these things but have passed your 60 day return policy as we ordered it while abroad and the biggest regret I have is having to now deal with reselling it on FB Marketplace.I apologize for the rant but it is an honest review and again, I hope it helps with future designs.
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.
I bought a smallish one a few months ago to use as a bear bag and it is perfect! Ultralight and it closes in a way that is waterproof and can squeeze our air. I just recently got another one (large one) to replace a pack liner & will be using it on my next trip. So far I have used it once in a day pack, and it worked well. Highly recommend!
I purchased the 20 liter dry sac as bag liner for my 40 ultimate Direction Fast Pack. Given the wt and durability this is a great option for pro texting items inside the pack for 4-5 day excursions during a fast pack trip or even a 100 mile race. The peace of mind knowing your gear is safe inside like sleep system and electronics “power bank” are a game changer. I did try polycro bag liner a bit to fragile for me. Over all happy with the purchase and would buy again and recommend for UL packing.
Just The bags I needed. I warm planning on using the 35L bags for my zero degree down quilts as emergency bag in my truck along with gloves matches beanie, ect.I bought some smaller bags with emergency gear in mind.I will setup with At least 2 bags for emergencies,. I figure a larger bag is easier to find In an emergency and the orange bags I have purchased are for the reasons and they are waterproof. Thanks Sea to Summit
These dry sacks are perfect for backpacking! I keep my clothes in one, my sleeping bag in another and my food in a 3rd. This eliminates the need for the annoying pack cover. And when push comes to shove, I can toss my electronics ie phone, battery pack, headphones etc into the food bag if it rains. I own several in various sizes and they’ve always been clutch.
This is one of the first Sea to Summit items I owned, it turned me on to S2S dry bags for life!The tradeoff of this bag being so lightweight is that it is not fully waterproof. Testing by submersing it resulted in some moisture inside. Which is fine and expected, a better use is using it to store a phone (inside a pack) during rain.I use it now to house my first aid kit. As a trip organizer, I am always passing the kit around to share moleskin or bandaids, and it has stood up to that wear and tear really well. The bright green color makes it easy to spot, and the small 8 liter size fits perfectly in the cap of my pack so it is easy to grab.For a short period of time, I used this bag as a snack bag, but this bag does not a D ring to hang it. The 8 liter size is ... MoreThis is one of the first Sea to Summit items I owned, it turned me on to S2S dry bags for life!The tradeoff of this bag being so lightweight is that it is not fully waterproof. Testing by submersing it resulted in some moisture inside. Which is fine and expected, a better use is using it to store a phone (inside a pack) during rain.I use it now to house my first aid kit. As a trip organizer, I am always passing the kit around to share moleskin or bandaids, and it has stood up to that wear and tear really well. The bright green color makes it easy to spot, and the small 8 liter size fits perfectly in the cap of my pack so it is easy to grab.For a short period of time, I used this bag as a snack bag, but this bag does not a D ring to hang it. The 8 liter size is small enough that a carabiner can be clipped through the folded over section without weight being an issue. I would be hesitant to hang much weight in the larger ultra-sil dry sacks... The lightweight dry sacks are a better option if you are looking for something to hang with.
These sacks are the best! I only use Sea to Summit stuff sacks and dry sacks. I've not found another brand of sacks that are any where close to as reliable and well made. The Ultra-Sil dry sacks are fantastic for backpacking. I use them for storing electronics, storing my tent, storing clothes, storing and hanging food, basically for everything. If you're looking for an ultralight, durable, and reliable dry sack, you cannot go wrong with these sacks!
| Hand Orientation | Left/Right |
| Season | 4 |
| Sport | Camping & Hiking |
| Included Components | dry sack |
| Product dimensions | 23.88 x 10.92 x 10.92 cm; 14.17 Grams |
