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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
$14.95 - $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


Part Numbers

Option UPC Store SKU
Lime / 1L 9327868010486 ULT26718929N
Lime / 2L 9327868010493 ULT2680153N
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 / 13L 9327868010387 ULT29751514E
Pacific Blue / 20L 9327868010394 ULT29253279E
Pacific Blue / 35L 9327868010400 ULT29516185E
Orange / 1L 9327868010417 ULT23230470E
Orange / 2L 9327868010424 ULT23405255E
Orange / 4L 9327868010431 ULT23561542E
Orange / 8L 9327868010448 ULT23291792E
Orange / 13L 9327868010455 ULT24257731E
Orange / 20L 9327868010462 ULT24888959E
Orange / 35L 9327868010479 ULT24511769E