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Sea to Summit Ultra-Sil Dry Sack

Sea to Summit Ultra-Sil Dry Sack
  • Color: Lime
  • Color: Pacific Blue
  • Color: Orange
  • Color: Grey
$12.71 - $29.96
$16.95 - $39.95
Please select options


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.


-Suitable for paddle sports? No. Featherweight fabrics are not appropriate for the sharp or abrasive elements in watersports. We recommend Lightweight Dry Sacks for general paddle use.

-Waterproof? The fabric is more than adequately waterproof (2000+ mm hydrostatic head) for the intended use (storage inside a backpack or duffle).

-Worth their weight and cost? Once you have experienced modular packing with ultralight, easy to pack, translucent dry bags, you’ll wonder how you ever lived without them.


1 liter: a phone in a waterproof case (double bagging essential), snacks & wallet
2 liter: some snacks, first aid essentials, gloves or beanie

4 liter: shell jacket or gloves / beanie, day-hiking essentials
8 liter: a two-season or a high-end three-season down sleeping bag, dry clothes for a backpacking trip
13 liter: all your clothes for a backpacking trip or a mid-range three season sleeping bag
20 liter: a three-season synthetic sleeping bag plus a Reactor Liner
35 liter: use as a full pack liner for overnight (30+ Liter) packs

  • 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
1L 2L 4L 8L 13L 20L 35L
Dimensions 11x24 cm 13x29 cm 15x33 cm 17x46 cm 22x53 cm 25x61 cm  30x70 cm
4.9x9.4" 5.1x11.4" 5.9x13" 6.7x18" 8.6x21" 10x24" 12x27"
Capacity 1L 2L 4L 8L 13L 20L 35L
Weight 20g 23g 26g  30g 40g 50g  65g
0.7 oz 0.8 oz 0.9 oz 1.1 oz 1.4 oz 1.8 oz  2.3 oz


Part Numbers

Option UPC Store SKU
Lime / 4L 9327868010509 ULT26480018N
Lime / 8L 9327868010516 ULT26428570N
Lime / 13L 9327868010523 ULT27707059N
Lime / 20L 9327868010530 ULT27198175N
Lime / 35L 9327868010547 ULT27231475N
Pacific Blue / 1L 9327868010349 ULT28714590E
Pacific Blue / 2L 9327868010356 ULT28685499E
Pacific Blue / 4L 9327868010363 ULT28205751E
Pacific Blue / 8L 9327868010370 ULT28844639E
Pacific Blue / 20L 9327868010394 ULT29253279E
Pacific Blue / 35L 9327868010400 ULT29516185E
Orange / 2L 9327868010424 ULT23405255E
Orange / 8L 9327868010448 ULT23291792E
Orange / 20L 9327868010462 ULT24888959E
Orange / 35L 9327868010479 ULT24511769E