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  • Sea To Summit - Detail
  • Sea To Summit - Ultra-Sil Nano Dry Sack - Orange
  • Sea To Summit - Ultra-Sil Nano Dry Sack - Lime
  • Sea To Summit - Detail -
  • Sea To Summit - Detail -

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  • Sea To Summit - Ultra-Sil Nano Dry Sack - Orange
  • Sea To Summit - Ultra-Sil Nano Dry Sack - Lime

Sea To Summit Ultra-Sil Nano Dry Sack

$13.95 - $34.95

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    • Orange, 1L
    • Orange, 2L
    • Orange, 4L
    • Orange, 8L
    • Lime, 2L
    • Lime, 4L
    • Lime, 8L
    • Lime, 13L
    • Lime, 20L
    • Lime, 35L

    15 Reviews


    For when dry matters as much as lightweight.

    Keep your on-trail, on-deck, and on-board wares protected from the elements with the Sea to Summit Ultra-Sil Nano Dry Sack. Weighing scantly an ounce, this waterproof barrier might be silly light, but when it comes to repelling water and standing up to Mother Nature's wrath, it's über-serious.
    • Lightweight, durable nano sil nylon keeps your items bone dry without weighing your pack down
    • Hypalon waterproof roll-top closure seals out moisture for worry-free traveling and trekking
    • Fully taped seams prevent water from sneaking in through the fabric joints
    • A variety of size options let you dial in the perfect fit for the gear you want to quarantine
    • Only intended for use inside a pack or bag; not designed for paddlesports
    • Item #STS0120

    Tech Specs

    15D Ultra-Sil Nano nylon
    [1L] 61 cu in, [2L] 122 cu in, [4L] 244 cu in, [8L] 488 cu in, [13L] 793 cu in, [20L] 1221 cu in, [35L] 2136 cu in
    [1L] 9.4 x 5.1 x 3 in, [2L] 11.2 x 5.9 x 3.7 in, [4L] 13 x 6.7 x 4.4 in, [8L] 18.5 x 7.9 x 5.9 in, [13L] 20.5 x 8.9 x 6.5 in, [20L] 24.8 x 10.2 x 7.9 in, [35L] 27.6 x 12.2 x 9.8 in
    Hypalon waterproof roll-top
    yes, fully taped seams
    Backpack Straps
    Claimed Weight
    [1 L] 0.5 oz, [2 L] 0.6 oz, [4 L] 0.7 oz, [8 L] 0.8 oz, [13 L] 1 oz, [20 L] 1.3 oz, [35 L] 1.6 oz
    Recommended Use
    backpacking, watersports, travel
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Super light weight but not durable

    • Familiarity: I've used it several times

    Incredibly light weight but be very careful with these dry sacks. After one trip mine was showing wear from setting it down on rocks with food inside and on the second trip 2 more wear spots appeared. If you are very careful these work great but as a bag that you are pulling in and out of your pack you might want something more durable.

    Light and durable

    • Familiarity: I've used it several times

    I have a couple of these that I used for my clothes and sleeping bag when backpacking. At a fraction of an oz you almost can't find anything lighter. I find the 13 L to be the perfect size to fit all the clothes I need or a 20-30 degree down sleeping bag. The roll closure is also great because it allows you to compress the contents for more efficient packing.

    very good dry sack

      This is an awesome dry sack and I have not had any problems with it. I have had it fully submerged and everything stayed dry as long as it is tight. I don't have much to say about this product but it is very good quality and I would highly recommend it.

      Lightweight and Durable

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

      Bought a 4L bag as a gift and it has been working great so far. This sack packs down to virtually nothing and although it seems flimsy, they are much more durable than they look. Great for storing a wide array of stuff from clothes to electronics, anything you want to keep dry throw it in the sack and you can feel confident that it will keep the moisture out.


      • Familiarity: I've used it several times

      After purchasing one of these sacks to protect my down bag on wet backpacking excursions, I'm completely sold on the design, weight, and durability of these dry sacks. First, they pack down to almost nothing when not in use, making it easy to pack several of them in with the rest of your gear. Secondly, for such a thin material they hold up surprisingly well against abrasion. Lastly, waterproofing is excellent and kept my bag dry the whole trip through rain and mixed snow conditions. I used this with my 8 x 17.5 in bag (dimensions when stuffed) and grabbed an 8L which proved to be a little too snug. I was still able to fit it and completely roll and clip the bag, however I could have definitely used the extra room with a 13L. When in doubt, size up! Rookie mistake



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

      I'd been wary of adding extra bulk to my pack / panniers with these bags, but bought two to help with organization. They are incredible. Haven't yet tested the waterproof nature of these, but I've used the 13L as a sleeping bag stuff sack and my down has kept nice and dry.

      Great bags

      • Familiarity: I've put it through the wringer

      I almost returned these bags because they felt so thin and cheap. After three kayak-trips, I'm buying more. They are super light-weight and stronger then they look. They took several dunkings and never leaked.

      Keeps my junk dry

      • Familiarity: I've put it through the wringer

      I bought a 2L and an 8L in these and they work great! Ive used them for kayaking, hiking, and I even put my valuables in them when it rained at the beach. They're so lightweight compared to my other dry bags (which are the ones you buy at Walmart so I guess that's not saying much). I use these for the important junk I really need to keep dry. Unfortunately my 2L somehow got holes in the bottom after about 5 months of wear and tear, but my 8L is still going strong and doing what it was made for! Keeping junk dry!


      • Familiarity: I've used it several times

      I've had the 2L size for a few years, usually used to keep small stuff (wallet/phone/sunglasses/etc) dry while on small boats. It works for the most part, but if you fill it with water to check waterproofness, it'll leak in a half dozen spots (not on the seams); not a strong streaming leak mind you, but just slow dripping in spots. As such, I wouldn't really consider it a true dry bag that'll keep your stuff 100% dry if you threw it in a tub/pool/lake/ocean/etc for a period of time, but outside of that, it's great. (FWIW - I've switched to using a small Pelican case instead)

      I also got a small 1-2mm hole in it as well, despite never putting anything particularly pointy/sharp in it, nor have I been particularly rough with it. I suppose something sharp could've brushed up against it, but at least I know the ripstop works. It wasn't noticeable until I test-filled it with water after a few trips.

      Waterproof inside and out

      • Familiarity: I've put it through the wringer

      I use this for two purposes: 1) As a wash bag for clothes when I travel and laundry service/laundromat are not available, 2) As a backpacking/hiking waterproof bag for electronics (phone).

      The material feels a bit delicate, as it is see-through thin, and if given enough abuse, I wouldn't be surprised if it ripped or punctured. However, you would need to try in order to damage the bag beyond normal usage.

      For all uses so far, it keeps water out, or for my example described above, keeps water in.

      Highly recommended.

      These things rule.

      • Familiarity: I've put it through the wringer

      Use them fishing, beaching, MTB biking, hiking, canoeing, camping. Not responsible enough to keep sand and sea off my electronics without it.


      • Familiarity: I've put it through the wringer

      This stuff sack is super light and keeps all my clothes for my trips completely dry. I have one in 8L and one in 13L. These are surprisingly durable for how thin they are!

      A Great Product!

      • Familiarity: I've used it several times

      I have used these stuff sacks in both backpacking and backcountry skiing for two years. My wife and I have about five each and we are very happy with them. They are waterproof and weigh about a quarter of what the stuff sacks they replaced did.

      How do these bags hold up over time?

      How do these bags hold up over time?

      While I don't own this item [yet], I do have some experience with the material.

      Keep it in your pack and don't put anything sharp-and-pointy in it and it should last forever.

      If you need a bag that can be exposed to rocks and brush, or one that you can drop down a scree hill, then get something a little heavier :-)

      What size would I need for an adult mummy...

      What size would I need for an adult mummy bag and smaller kids bag?
      What about one for about a 3-day supply of clothes (summer hike - two pair convertible pants, 2 or 3 light weight shirts, 2 socks, one short, emergency light gloves/hat).


      I use a 20L to carry a highly compressed sleeping bag, pad, thermal base layers, and a few other misc items, with plenty of room to spare, so I think the 20L could handle your two sleeping bags and some clothes. You could go for the 35L to be on the safe side - if you don't fill it up, the extra material rolls up into the top so it shouldn't take up too much extra room.