Sea to Summit Ultra-Sil Compression Sack

Weighs 76g (Medium size)
Code: SS17909V
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The lightweight Sea to Summit Ultra-Sil Compression Sack compresses your clothing and gear to around 1/3 the volume, saving space in your pack. 

Sea to Summit says:

If you need to compress down your gear into the smallest possible space while adding minimal weight, pack it into Siliconized CORDURA® Brand fabric Compression Sacks.

The Sea to Summit's Ultra-Sil Compression Sack is ideal for compressing your gear while keeping the contents secure. The 4 extra long straps allow it to be filled to capacity, then compressed to maintain it's pack size which is roughly around the size of a soft drink can.

The Ultra-Sil Compression Sack is roughly half the weight of the original Sea to Summit Compression Sack so its ideal for those who want to save a little more weight.

- Reviewed by Ultralight Outdoor Gear

  • 30D Diamond Ripstop Siliconized CORDURA
  • 4 straps for even compression
  • Extra long straps so these sacks can really be filled to capacity
  • Bar tack reinforced stress points
  • Pull handle on the bottom
  • Slippery finish for easy packing
  • Note: seams are not tape-sealed; therefore this product is not waterproof - only water resistant


  • Weight: 64g
  • Volume: 10 to 3.3L
  • Diameter: 18 x 40cm


  • Weight: 76g
  • Volume: 14 to 4.5L
  • Diameter: 20 x 46cm


  • Weight: 80cm
  • Volume: 20 to 6.7L
  • Diameter: 23 x 50cm


  • 30D Diamond Ripstop Siliconized CORDURA
Showing our 1 review for Sea to Summit Ultra-Sil Compression Sack. Write a review ›
Review Summary - 4 out of 5 based on 1 rating.
July 7, 2019 | David
Worked well

Worked well, very light. The straps had a tendency to twist which was somewhat annoying

Ultralight Outdoor Gear Limited