Sea to Summit Ultra-Sil Nano Dry Sack

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Designed with ultralight backpacking in mind the Ultra-Sil™ Nano™ Dry Sack is made from lightweight  15D siliconized Nylon. With the use of featherweight 15D fabric, these are perfect for use inside your pack to keep gear organized and dry. Using a hypalon roll-top closure that doesn't wick moisture, an oval base for easy packing, these are fully seam sealed for water resistance. Ideal for backpacking, climbing, cycle touring and modular packing where lightweight and low bulk is key.



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


Should be kept in another dry bag or backpack

Best Use

Backpacking, Travel, Bike Packing

What this bag could hold

1 liter: snacks, wallet

2 liter: first aid essentials (avoid hard or sharp objects), gloves/beanie hats, or some snacks

4 liter: shell jacket, gloves/beanie hat, or day-hiking essentials

8 liter: a two-season down sleeping bag or quilt, or dry clothes for backpacking

13 liter: a three-season down sleeping bag, or all your clothes for an ultralight backpacking trip

20 liter: a three-season synthetic sleeping bag plus a Reactor Liner

35 liter: use as a full pack liner for overnight (30+ Liter) ultralight backpacks


    Ultra-Sil Nano 15D Nylon fabric for high strength to weight performance

    Ultra-Sil Nano has a 1,200mm hydrostatic head

    Waterproof hypalon roll-top closure does not wick moisture

    Waterproof seams - double stitched and tape sealed

    Reinforced stitching on all stress points

    Siliconized fabric with a smooth finish for easy packing

    Compact and super lightweight with an oval base design for easy packing

    This product is not intended for boating or marine use

    Intended for use inside a bag or backpack


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