Up To 50% Off Summer Semiannual Sale—Shop Now
When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures.


  • Training

Extra 20% Off

Select Backcountry Exclusives—Shop Now

Sea To SummitUltra-Sil Nano 1-35L Dry Sack

Sea To SummitUltra-Sil Nano 1-35L Dry Sack


Select Style & Size:


4.5 out of 5 stars
15 Reviews

Ultra-Sil Nano 1-35L Dry Sack

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 (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
[1L] 9.4 x 5.1 x 3in, [2L] 11.2 x 5.9 x 3.7in, [4L] 13 x 6.7 x 4.4in, [8L] 18.5 x 7.9 x 5.9in, [13L] 20.5 x 8.9 x 6.5in, [20L] 24.8 x 10.2 x 7.9in, [35L] 27.6 x 12.2 x 9.8in
Claimed Weight
[1 L] 0.5oz, [2 L] 0.6oz, [4 L] 0.7oz, [8 L] 0.8oz, [13 L] 1oz, [20 L] 1.3oz, [35 L] 1.6oz
Recommended Use
backpacking, watersports, travel
Manufacturer Warranty

What do you think about this product?