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Ultra-Sil Compression Dry Sack


Ultra-Sil Compression Dry Sack

$48.95 $36.71
Waterproof ultralight compression + View tech specs
  • Size
  • ColorGrey

BEST USE: Backpacking

WATERPROOF? The body of the dry sack is more than adequately waterproof (2000 mm hydrostatic head) for the intended use (storage inside a backpack or duffle).

DIMENSIONS: 8 x 18 inches

WEIGHT: 3.2 oz | 90g

Shipping & Returns

Our warehouse is actively shipping orders from 8am to 1pm MST Monday through Friday. Most orders ship in one business day, but the transit time can take up to 7 days, depending on your distance from Boulder, Colorado.

2nd Day and Next Day Air orders will ship same day if placed by 1pm MST, Monday-Friday (except holidays).

All orders are eligible for fast and easy returns within 60 days of purchase.

For more details, please check out our Help Center

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Ultra-Sil Compression Dry Sack
Ultra-Sil Compression Dry Sack
$48.95 $36.71


The Ultra-Sil Compression Dry Sack is a super lightweight dry sack designed to compress sleeping bags or bulky clothing and keep them dry. It is designed for use inside a pack or duffle bag – the featherweight fabric is not intended for external use. Made from Ultra-Sil 30D CORDURA® Nylon fabric with an eVent® fabric base, air can be squeezed out by tightening the compression straps, but the eVent fabric keeps water out.

It's an ideal part of a modular packing system: quality fabrics, taped seams a hypalon roll-top, non-wicking closure with a Field Repair buckle keep the Ultra-Sil Compression Dry Sack light and functional

Design Details

Technical Features


Tech specs

  • Best Use
    Backpacking, Hiking & Bike Touring (used inside a bag or pack)
  • Closure
    Waterproof roll-top closure with lid and compression straps
  • Material(s)
    Ultra-Sil nylon body and eVent fabric base
  • Measurement
    Length - measured with roll-top closure open Volume - measured with closure rolled 3 times
  • Repair Buckle Size
    5/8in | 15mm (2-Pin)
  • Shape
    Cylindrical with round base for easy packing
  • Waterproof
    More than adequately waterproof for use inside a pack or duffel
XXS / 3.3 literXS / 6 literS / 10 literM / 14 literL / 20 liter

Frequently Asked questions

Is this compression sack suitable for bikepacking?

No. Bikepacking subjects bags to a lot of sharp and abrasive elements. The featherweight fabric is simply not designed for sharp points or rough surfaces. We recommend the Nylon eVent Compression Dry Sack for this use.

Is this compression sack worth the weight and cost?

Once you have experienced modular packing with ultralight compression sack you’ll wonder how you ever lived without them.

Is this compression sack a good tent storage bag?

Perhaps. Carrying the tent canopy in your pack (with the poles under the compression straps) is a great idea. However - the canopy may not compress that much.

Is this compression sack waterproof?

The body of the compression sack is waterproof enough (2000 mm hydrostatic head) for use as storage inside a backpack or duffle.

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