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Ultra-Sil Dry Sack

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Ultra-Sil Dry Sack is available for purchase in increments of 1

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.


Durability - Keep it inside your pack and away from hard edges and corners

Waterproofness - Should be kept in another bag or backpack

Best Use - Backpacking, Hiking, Bike Packing & Travel

  • The Ultra-Sil Dry Sack won the Backpacker Editors’ Choice award, 2006
  • 30D siliconized high-tenacity CORDURA Nylon fabric for extra strength, durability and a smooth finish for easy packing
  • Ultra-Sil fabric has a 2,000mm hydrostatic head
  • Waterproof hypalon roll-top closure does not wick moisture
  • Waterproof seams - double stitched and tape sealed
  • Reinforced stitching for greater seam strength on all stress points
  • Super compact and ultra lightweight
  • This product is not intended for boating or marine use

What this bag could hold

  • 1 liter: a phone (in a waterproof case - double bagging essential), snacks, wallet & keys
  • 2 liter: some snacks and drinks or extra layers
  • 4 liter: a layer and a meal or so worth of food
  • 8 liter: a puffy jacket & a sleeping bag or food for 2-3 days
  • 13 liter: all your clothes for a trip
  • 20 liter: a tent or any Sea to Summit sleeping bag
  • 35 liter: paddle gear, overnight camp equipment or bike gear

*If you select the color as ASSORTED you will receive a color at random in the size you selected*


  1 Liter 2 Liter 4 Liter 8 Liter 13 Liter 20 Liter 35 Liter
Dimensions 4.9 x 9.4 in 5.1 x 11.4 in 5.9 x 13 in 6.7 x 18 in 8.6 x 21 in 10 x 24 in 12 x 27 in
Gear Capacity 1 L 2 L 4 L 8 L 13 L 20 L 35 L
Weight 0.7 oz / 20g 0.8 oz / 23g 0.9 oz / 26g 1.1 oz / 30g 1.4 oz / 40g 1.8 oz / 50g 2.3 oz / 65g