Ultra-SilŪ Dry Sacks
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Ultra-Sil® Dry Sacks

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The new Sea to Summit Ultra-Sil® Dry Sacks are more than 50% lighter than our super popular Dry Sacks. They're made of Siliconized Cordura®, which is one of the lightest and toughest waterproof nylon fabrics available. Now you don't have to choose between keeping your gear dry and keeping it light.

  • A Backpacker magazine Editors' Choice Award Winner!
  • Super compact and ultra lightweight
  • Made of Ultra-Sil™ nylon, a polyurethane coated Siliconized Cordura® for ultimate waterproofing and maximum durability
  • Non-wicking Hypalon® roll top closure with stiffener at the top for a better seal
  • Soft and flexible with a slippery finish for easy packing
  • Nearly transparent allowing good visibility of the contents
  • All seams are double stitched and tape sealed
  • Smaller sizes have flat bottoms, others are round
  • Colors: kiwi green, sky blue and orange
Proper Use:
  • Any roll-top dry sack must be closed properly to ensure water can't get in. Begin by folding the Hypalon™ strip down first and be sure to have at least three rolls before closing the buckle.
  • Avoid contact with sharp objects or subjecting the sack to high abrasion, as this could compromise the waterproof fabric.
  • Ultra-Sil Dry Sacks should only be used to store sensitive electronic devices when used in conjunction with another, heavier-duty dry bag - the "double bag" method. For maximum protection of electronics the use of a waterproof hard case with a mechanical seal should be considered.
  • This product is not intended for boating or marine use.
Description Size (Dia. x Ht.) Weight
Ultra-Sil® Dry Sack - 1 Liter 6 flat x 9 inches .5 oz
Ultra-Sil® Dry Sack - 2 Liter 8 flat x 12 inches .7 oz
Ultra-Sil® Dry Sack - 4 Liter 9 flat x 15 inches .9 oz
Ultra-Sil® Dry Sack - 8 Liter 6.5 dia x 18 inches 1.1 oz
Ultra-Sil® Dry Sack - 13 Liter 8.5 dia x 21 inches 1.4 oz
Ultra-Sil® Dry Sack - 20 Liter 10 dia x 24 inches 1.7 oz
Ultra-Sil® Dry Sack - 35 Liter 12 dia x 27 inches 2.2 oz
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