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Sea To SummitUltra-Sil 1-35L Dry Sack

Sea To SummitUltra-Sil 1-35L Dry Sack


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4.5 out of 5 stars
45 Reviews

Ultra-Sil 1-35L Dry Sack

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
1L (61cu in), 2L (122cu in), 4L (244cu in), 8L (488cu in), 13L (793cu in), 20L (1220cu in), 35L (2136cu in)
yes, fully taped seams
Hypalon waterproof roll-top
(width x height) [1L] 6 x 9in, [2L] 8 x 12in, [4L] 9 x 15in, (diameter x height) [8L] 6.5 x 18in, [13L] 8.5 x 21in, [20L] 10 x 24in, [35L] 12 x 27in
Claimed Weight
[1L] 0.5oz, [2L] 0.7oz, [4L] 0.9oz, [8L] 1.1oz, [13L] 1.4oz, [20L] 1.7oz, [35L] 2.2oz
Recommended Use
backpacking, rafting
Manufacturer Warranty

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