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Sea to Summit Ultra-Sil Dry Sack, Ultralight Dry Bag

4.7 4.7 out of 5 stars 1,560 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Marine Dry Bags by Sea to Summit

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2 Liter

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About this item

  • Ultralight 2-liter roll-top dry sack is the ideal dry storage and organizing option for backpacking, bike touring, and travel
  • Manufactured from 30D Ultra-Sil Cordura nylon with a smooth finish for easy packing; 2,000mm waterhead (the higher the waterhead rating, the more waterproof the fabric)
  • Reinforced waterproof seams are double-stitched, and tape sealed, with reinforced stitching at stress points; secure hypalon roll-top closure; fabric is translucent for visibility of contents
  • Cylindrical base has ideal height-to-width ratio for easy packing; patent-pending field repair buckle can be replaced in seconds
  • 2-liter dry bag is ideal for carrying snacks, trip essentials, gloves, and hats; open dimensions: 5.1 x 11.4 inches, weight: 0.8 ounces, volume: 2 liters (with closure rolled three times)

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$13.46
Get it as soon as Monday, Apr 1
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Product Description

Sea to Summit stands for a culture of design perfectionists who develop ingenious, functionally beautiful products with an independent, free-thinking Australian attitude. We strive to create equipment that is nimble and light, but serious enough to deliver when called into duty. Gear that works just that little bit better, so you may find yourself inspired to take the less-traveled road more often.

Ingenious. Functional. Reliable. Unconventional. Inspiring.

Ultra-Sil Dry Sack
Lineup with Editors' Choice logo.

The 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.

Ultra-Sil Dry Bag

CORDURA brand fabric logo.
CORDURA FABRIC

We use Cordura brand high strength nylon fabrics as the base for a number of our products before we further strengthen it with a siliconization process. This fabric has an incredible tear strength to weight ratio and will surprise you consistently with what it can handle.

What this bag could hold

  • 1 liter: a phone (in a waterproof case - double bagging essential), snacks & wallet
  • 2 liter: some snacks, first aid essentials, gloves or beanie
  • 4 liter: shell jacket or gloves / beanie, day-hiking essentials
  • 8 liter: a two-season or a high-end three-season down sleeping bag, dry clothes for a backpacking trip
  • 13 liter: all your clothes for a backpacking trip or a mid-range three season sleeping bag
  • 20 liter: a three-season synthetic sleeping bag plus a Reactor Liner
  • 35 liter: use as a full pack liner for overnight (30+ Liter) packs
30D Ultra-Sil logo

An incredibly lightweight yet durable fabric used in a large number of Sea to Summit products. This 30 denier Nylon is made with CORDURA yarns for strength, woven into a ripstop pattern. Two versions of the fabric are used:

  • water-resistant products (such as the Ultra-Sil Stuff Sacks) are siliconized on both sides for ultimate packability
  • waterproof products (such as the UltraSil Dry Sack are) siliconized on the outside and PU-coated on the inside to allow seam taping.

Both versions have a hydrostatic head greater than 2000mm – which makes them more than adequately waterproof for the types of environments they are intended for.

Woman reading in tent with Sea To Summit dry bags.

Product Description

The Sea to Summit Ultra-Sil Dry Sack is an ultralight dry storage and organizing option for backpacking, bike touring, and travel. Manufactured from 30D Ultra-Sil Cordura nylon, its reinforced waterproof seams are double-stitched, and tape sealed, with reinforced stitching at stress points; 2,000mm waterhead (the higher the waterhead rating, the more waterproof the fabric). A secure hypalon roll-top closure keeps moisture out. The Sea to Summit Ultra-Sil Dry Sack features translucent fabric for visibility of contents, and its cylindrical shape has an ideal height-to-width ratio for easy packing. A patent-pending field repair buckle can be replaced in seconds with a Phillips screwdriver. Dry bag available in seven sizes: 1 liter, 2 liter, 4 liter, 8 liter, 13 liter, 20 liter, and 35 liter, to carry everything from small essentials to group gear. Sea to Summit products are guaranteed against defects in materials or workmanship for the lifetime of the product.

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Sea to Summit Ultra-Sil Dry Sack, Ultralight Dry Bag


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Customer reviews

4.7 out of 5 stars
4.7 out of 5
1,560 global ratings

Customers say

Customers like the waterproofness, quality and weight of the dry bag. For example, they mention it's well made, light and the buckles are strong. That said, they appreciate the versatility and value for money. That being said, some appreciate performance, and size.

AI-generated from the text of customer reviews

67 customers mention60 positive7 negative

Customers like the waterproofness of the bag. For example, they mention it's durable, keeps its contents dry, and does a great job at keeping moisture out. Some say it'll never get water inside. That said, it'd be great for backpacking to keep your stuff dry.

"...But to keep the contents dry this bag is a no brainer. Dry, light weight and build quality it’s the one to get...." Read more

"...Kept my coat completely airtight...." Read more

"...Never had an issue with it leaking. Additional the fact that it is soft it fits easily in any backpack or hydration type bag." Read more

"...Otherwise it is as advertised. Silicone based water proofing is easier and more standard to repair, and matches the rest of my kit...." Read more

62 customers mention49 positive13 negative

Customers like the weight of the bag. They say it's durable, perfect for a weight conscious backpacker, and an ultralight bag that can't be beat. Some say it is affordable and the perfect dry sack for their sleeping bag.

"Their affordable, lite, and feel like their made well. Taken these on 4 different bicycle touring weekends, and they still look new!..." Read more

"Looks durable and definitely light!" Read more

"...It seems to be lighters weight and of higher quality than my other dry bags." Read more

"Very light and compact so it can be taken anywhere. It also floats in case it falls off your kayak or paddle board...." Read more

60 customers mention48 positive12 negative

Customers like the quality of the dry bags. They say it's well made, tough, and holds up just fine. Customers also say the bags are made of super fine nylon and have a pleasant feel to them. They are strong enough to hold several pounds of food and keep everything dry. The seals, clips, and seams all stand up to the abuse and the bag dries quickly. Overall, customers are happy with the quality and functionality of the bags.

"...Not to fear it is of good quality. Buckles are nicely made and fit together very good and can be replaced if in time that becomes necessary...." Read more

"Their affordable, lite, and feel like their made well. Taken these on 4 different bicycle touring weekends, and they still look new!..." Read more

"Perfect for a personal first aid kit" Read more

"Looks durable and definitely light!" Read more

50 customers mention50 positive0 negative

Customers find the stuff sack versatile and useful for backpacking. They say it's a great way to pack stuff that could potentially get wet. Customers also mention that the build quality is perfect and the sack is lightweight.

"...As for the build quality, it’s perfect. Typical Sea to Summit, good quality...." Read more

"...Supper light and packs up real small if you are not using it. Kept my coat completely airtight...." Read more

"...plus they pack great with how lite they are. Definitely gonna get a few more." Read more

"...Additional the fact that it is soft it fits easily in any backpack or hydration type bag." Read more

38 customers mention38 positive0 negative

Customers are satisfied with the performance of the dry bag. They mention that it works well for a short amount of time, it works great in camping to keep sleeping bags and the like, and it works perfectly for a long hike. Some say that the product works better than expected and is better than advertised. That said, some are happy with the product's performance.

"Use this to store my rain coat to store on my bike and it works great. Supper light and packs up real small if you are not using it...." Read more

"...Used as a bag liner in my hiking pack, works well." Read more

"...4 person catamaran for a snorkel trip, and this dry bag worked great to keep my phone/wallet/snacks dry from the salt water...." Read more

"I used the 20L as a bear bag and it worked great! Strong enough to hold several pounds of food and kept everything dry...." Read more

32 customers mention29 positive3 negative

Customers are satisfied with the size of the waterproof pouch. They mention that it fits nicely inside their pack, is small enough to wrap their cell phone up, and fits roughly 75% of their back pocket. Customers also appreciate the variety of sizes for many applications, as well as the ability to roll down to a very small thing. Some customers also say that the pouch is perfect to stuff some clothes into to keep them dry while backpacking.

"...Not to fear it is of good quality. Buckles are nicely made and fit together very good and can be replaced if in time that becomes necessary...." Read more

"...But I bought this sea to summit bag because it was the right size for my down sleeping bag...." Read more

"Have some already so bought more. Tough, hold a ton of stuff, helps with packing." Read more

"Very light and compact so it can be taken anywhere. It also floats in case it falls off your kayak or paddle board...." Read more

9 customers mention9 positive0 negative

Customers find the value of the product to be great. They mention that it works for the price and is a great buy.

"Their affordable, lite, and feel like their made well. Taken these on 4 different bicycle touring weekends, and they still look new!..." Read more

"I got this for a fairly good price on a lighting sale. Used as a bag liner in my hiking pack, works well." Read more

"...It held my water bottle, phone, wallet, keys, and towel! Great buy" Read more

"...Good buy." Read more

7 customers mention7 positive0 negative

Customers like the appearance of the cycling helmet. They mention that it looks nice, has a nice color, and matches the rest of their kit. Customers also appreciate the grey color, which is dark enough for privacy but light enough to see what you need.

"...Taken these on 4 different bicycle touring weekends, and they still look new! plus they pack great with how lite they are...." Read more

"...water proofing is easier and more standard to repair, and matches the rest of my kit...." Read more

"Light, sleek, easy to put it into and pull out of the harness on my bike, so I'm very happy." Read more

"...looks nice, and ultralight. The grey is dark enough for privacy but light enough to see what you need if you know what it is you’re looking for...." Read more

Great bear bag for backpacking!
5 Stars
Great bear bag for backpacking!
I used the 20L as a bear bag and it worked great! Strong enough to hold several pounds of food and kept everything dry. My friend had the heavier version of this bag, but IMO this lighter version was sufficient (unless you’re boating).
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