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  • Sea To Summit - Ultra-Sil Dry Sack - Orange
  • Sea To Summit - Ultra-Sil Dry Sack - Green
  • Sea To Summit - Ultra-Sil Dry Sack - Blue
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  • Sea To Summit - Ultra-Sil Dry Sack - Orange
  • Sea To Summit - Ultra-Sil Dry Sack - Green
  • Sea To Summit - Ultra-Sil Dry Sack - Blue

Sea To Summit Ultra-Sil Dry Sack

sale $12.95 - $32.95

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    • Orange, 1L
    • Orange, 2L
    • Orange, 4L
    • Orange, 8L
    • Orange, 20L
    • Green, 1L
    • Green, 2L
    • Green, 4L
      sale $15.95
    • Green, 8L
    • Green, 20L
    • Blue, 35L

    45 Reviews


    Wet trails don't have to mean wet gear.

    The Sea To Summit Ultra-Sil Dry Sack is made with with siliconized Cordura to make it incredibly light, durable, and waterproof. Bring it along when you're backpacking or climbing, when you need to protect your gear from wet weather without taking on additional weight. Translucent for easy packing and identification, the Ultra-Sil Dry Sack features a slippery finish so it slides easily into your backpack.
    • All seams are double-stictched and taped to prevent leakage
    • Non-wicking Hypalon roll-top closure includes sitffeners at the top for a better seal
    • Suitable to keep contents dry in wet situations, but submersion is not recommended
    • Item #STS0121

    Tech Specs

    Ultra-Sil (siliconized Cordura), PU coating
    1 L, 2 L, 4 L, 8 L, 13 L, 20 L, 35 L
    (width x height) [1L] 6 x 9 in, [2L] 8 x 12 in, [4L] 9 x 15 in, (diameter x height) [8L] 6.5 x 18 in, [13L] 8.5 x 21 in, [20L] 10 x 24 in, [35L] 12 x 27 in
    Hypalon waterproof roll-top
    yes, fully taped seams
    Backpack Straps
    Claimed Weight
    [1 L] 0.5 oz, [2 L] 0.7 oz, [4 L] 0.9 oz, [8 L] 1.1 oz, [13 L] 1.4 oz, [20 L] 1.7 oz, [35 L] 2.2 oz
    Recommended Use
    backpacking, rafting
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Ultra Great

    • Familiarity: I've put it through the wringer

    The 1L makes a perfect waterproof ditty-bag to hold all my essentials for quick access while remaining weatherproof. These bags are pretty lightweight, but I've had no durability issues.

    The best out there

    • Familiarity: I've put it through the wringer

    The best dry bags out there. I use them to keep many camera and lenses dry when I'm out on a rainy day. I also use them in slot canyons, boating, and river trips.

    Great when used properly

    • Familiarity: I've used it several times

    Extremely light weight dry bag, I got the 2L which is a great size for a couple of small items. Kept it inside my backpack which would regularly get wet when I was working on the East Coast but the items that I kept in the dry bag always stayed dry. I agree with previous reviews that the material does seem like it has the potential to rip quite easily and if I needed a dry bag for a more rugged adventure I would use one of my thicker ones instead of this one.

    Lite & Dry

    • Familiarity: I've used it several times

    This is such a great lightweight dry bag. Perfect for any occasion when you'd need to keep your phone, camera, and/or extra layers dry. Definitely gets it done right!

    Great stuff sacks!

    • Familiarity: I've used it several times

    These waterproof stuff sacks are invaluable for backpacking. Used them for clothes, sleeping bag/liner, toiletries, and food without disappointment. A little pricey but worth it to keep your gear dry in a downpour. They tear easily if used in an abrasive situation but if they stay in the pack most of the time, they work well.

    Sea To Summit Ultra-Sil Dry Sack

    • Familiarity: I gave it as a gift but have feedback to share

    Got this for my brother in preparation for Hurricane Irma in Florida. Hopefully he won't need it, but if he does, it should keep all of his essentials dry.

    Great to keep small items dry

    • Familiarity: I've used it several times

    this works great to keep essential things (headlamp, lighter, small first aid kit) dry on trips where they can't get wet. It is a pretty thin material, so I wouldn't put it anywhere where it could get abraded or cut.

    Works well if used correctly

    • Familiarity: I've put it through the wringer

    Great dry bag if you're planning on just putting gear in it and keeping it on a boat. However, I can't say the material is terribly strong, and it can be punctured fairly easily. I was using it tubing on the river and it was dragging behind my tube. Must have bumped a couple of rocks because there was a tear in it at the end of my ride and some gear got wet. Probably my fault for dragging it but I feel as though it could be a bit more durable.

    Light weight and waterproof!!

    • Familiarity: I've used it several times

    I just wanted something to protect some essential clothing and whatnot from the elements but did not want to add any weight to my pack. So far this dry sack has done its job! I'm very happy with how light weight it is as well!

    Super light and super right.

      This thing organizes all my snacks and small stuff, and it doesn't add much weight or packing space to my rig. It's also super protective and seems highly durable. The roll-top is super secure.

      Perfect for backpacking

        These things are great to help organize any pack. Use them for food, or to keep wet clothes/towels separate in your backpack. They also make great additional storage, strap them to the outside if you have too much gear! Easy to find a use for any size.

        Dry bag

          I bought several of these bags to keep certain articles dry in addition to pack rain cover. You can use one inside a small pack to keep everything dry and place phone and other electronics inside small dry bag and placed inside large dry bag for added protection. Looks like they will wear good but don't allow bag to rub against anything hard or protruding object or will wear away protective layer. I now feel secure in the fact everything will be dry when I make it to camp.

          Works well for the price

          • Familiarity: I've used it once or twice and have initial impressions

          Great for canyoneering, backpacking and river trips. It's not exactly a burly bag but it gets the job done. When i go canyoneering i put my items that need to stay dry in the dry sack, and then put the dry sack inside of a backpack to keep it from getting damaged.

          Tore after a day of use

          • Familiarity: I've used it once or twice and have initial impressions

          I used an 8L for 5 day trip to pack some warmer gear. I loved it, but on the second day it just tore for no reason. Returning it sadly. I may need to just upgrade to the heavier duty sack sold by sea to summit. Really bummed this one crapped out so fast on me.

          Dry and Light

            This dry bag is truly dry. My first time using it, I attached it to the front of my paddleboard with my phone inside, and luckily, the truly stayed dry and kept my phone safe!

            A lot of dry bags seem to be really heavy and thick, and this one is light, without sacrificing quality and practicality.

            Unanswered Question

            I'm thinking of creating my own backpack with stuff sacks. I would like to use a 20 liter for the main body, and then use two smaller ones for the smaller gear. I need to have lightweight, durable and as waterproof as possible. Any suggestions?



            Unanswered Question

            What size would work best for a XL Mountain Hardwear Kelvinator down jacket w/hood? I don't like the built in one w/zipper so need something else. thanks, Rob

            Would this work well as a bear bag?

            Would this work well as a bear bag?

            Best Answer

            Joseph - I think so. The waterproof coating will keep your items dry in the rain or snow and the Cordura fabric is reasonably bomber, so you should be able to load this up without fear of breaking it under the weight.

            I want to get one of these. Which size...

            I want to get one of these. Which size would best fit a kelty cosmic 20 degree down bag? Thanks!

            Best Answer

            I'd go for the 8L to be on the safe side. If the sleeping bag compresses smaller than 8L you can always roll the excess dry-sack material up into the top. I use a 20L model to carry my 40 degree bag, sleeping pad, base layers, insulating layer, beanie, and gloves, and I still have a little extra room in the top, and it still fits horizontal across the bottom of my 80L backpack.