Sea to Summit Ultra-Sil Dry Sack

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The Ultra-Sil™ Dry Sack won the sought-after Backpacker Editors' Choice award in 2006 and is still the ideal dry sack for backpacking and travel. Made with lightweight, waterproof 30D Ultra-Sil™ fabric featuring CORDURA® yarns it's the perfect choice for modular packing to organize your gear inside your backpack or duffle like a pro. The semi-translucent fabric means that it’s easy to see what’s in each dry bag, and if you're really organized you'll make use of multiple color options to find things even easier. Other features include a non-wicking hypalon roll-top closure, a round base for ease of packing and taped seams to keep moisture out. An excellent choice for lightweight backpacking, cycle touring and travel.

Are Ultra-Sil Dry Sacks...?

    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.

What this bag could hold

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

    Avoid sharp or hard-edged objects and abrasive surfaces

    Waterproof hypalon roll-top closure does not wick moisture

    Waterproof, reinforced 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

    As of 2018: Features the patent-pending 5/8in | 15mm Field Repair Buckle with stainless steel pins


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