If you need to compress down your gear into the smallest possible space while adding minimal weight, pack it into a Sea to Summit Ultra-Sil Compression Sack made from Siliconized CORDURA Brand fabric. Features: 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 Specs: Size: Small Length: 7" Height/Depth: 16" Weight: 2.3 oz Volume: 10 liter to 3.3 liter