Ultra-Sil Compression Dry Sack

Ultra-Sil Compression Dry Sack

from Sea to Summit

  • $43.95

Ultra-Sil Compression Dry Sack comes with complimentary free shipping from Trail and Ski.

The Ultra-Sil™ Compression Dry Sack is a super lightweight dry sack designed to compress bulky clothing or other squishable gear that lives inside your pack. Made from Ultra-Sil™ 30D CORDURA® Nylon fabric with an eVent® fabric base, the air can be rolled out but can't get back in. It's an ideal option for use inside a backpack during longer lightweight hikes, adventure travels, cycle touring and any activity where you need to maximize pack space by compressing your bulky items to one-third of their volume. It employs waterproof seams, a hypalon roll-top, non-wicking closure and is super lightweight.


  • Durability
    • Keep it inside your pack and away from hard edges and corners.
  • Waterproofness
    • Greater than 2000mm hydrostatic head – more than sufficient water protection for use inside a pack
  • Best Use
    • Backpacking, Hiking & Bike Packing
  • What this bag could hold:
    • XXS / 3.3 liters: socks, underwear & beanie
      XS / 6 liters: Extra layers or a high-performance sleeping bag (such as the Spark 25°F) or a quilt (Ember 25°F)
      S / 10 liters: a two-season or a high-end three-season down sleeping bag or a larger puffy jacket
      M / 14 liters: a mid-range three season sleeping bag
      L / 20 liters: a three-season synthetic sleeping bag plus a Reactor Liner


  • Waterproof hypalon roll-top closure with lid and 4 straps for compression
  • Air permeable eVent fabric base allows air to be pushed out but water can't get in
  • Lightweight Ultra-Sil body
  • Waterproof seams - double stitched and tape sealed
  • Reinforced stitching on all stress points
  • Roughly half the weight of the original eVent Compression Dry Sack
  • As of 2018: Features the patent-pending 5/8in | 15mm Field Repair Buckle with stainless steel pins

We Also Recommend