Sea to Summit Ultra-Sil Dry Sack

0 - 7% OFF

$12.90$37.90 inc GST.

Sea to Summit Ultra-Sil Dry Sacks are made of Siliconized Cordura®, one of the lightest and toughest waterproof nylon fabrics available.

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The new Sea to Summit Ultra-Sil Dry Sack is more than 50% lighter than our super popular Dry Sack. They’re made of Siliconized Cordura®, which is one of the lightest and toughest waterproof nylon fabrics available. Now you don’t have to choose between keeping your gear dry and keeping it light.


  • Ultra-Sil® 30D siliconised high-tenacity Cordura® nylon fabric for exceptional strength
  • Ultra-Sil® fabric has a 2,000mm waterhead
  • Non-wicking Hypalon roll-top closure with stiffener at the top for an improved seal
  • Fully seam sealed for water resistance
  • Translucent for easy visibility of contents
  • Slippery finish for easy packing
  • Round base in all sizes


Volume Base x Height Weight
1L ø11 x 24cm 20g
2L ø13 x 29cm 23g
4L ø15 x 33cm 26g
8L ø17 x 46cm 30g
13L ø22 x 53cm 40g
20L ø25 x 61cm 50g
35L ø30 x 70cm 65g






Any ultra-sil dry sack must be closed properly to ensure water can’t get in. Begin by folding the Hypalon™ strip down first and be sure to have at least three rolls before closing the buckle.

Avoid contact with sharp objects or subjecting the sack to high abrasion, as this could compromise the waterproof fabric.

Like all manufacturers of roll-top, fabric dry sacks, Sea to Summit recommends that sensitive electronic devices be ‘double bagged’ (i.e. putting electronics inside one dry sack then placing this inside a second dry sack). For maximum protection, the use of a waterproof hard case should be considered.

Not intended for situations where dry sack will be submerged under water.

NB: While our Drysacks are designed to protect gear from rain and water dunking accidents they cannot guarantee to protect electronic gear when fully submerged. For this we recommend fully rated IPX standard diving protection cases.

Additional information

Weight N/A
Dimensions N/A

1L, 2L, 4L, 8L, 13L, 20L, 35L


Blue, Green, Grey, Orange


Sea to Summit

Sea to Summit is an innovative design and product development company that engineers a wide range of intuitively simple products that help make time in the outdoors fun, efficient and comfortable. From our West Australian base, Sea to Summit has grown into an award-winning global brand sold in more than 60 countries. Significant growth and international recognition has strengthened our original ethos ‘to equip and inspire’ and it continues to drive our research and development of the best materials and production methods. It inspires new product innovations that keep us at the forefront of bringing lighter, better made, better performing gear to outdoor enthusiasts around the world.


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