Sea to Summit now offers one of the hottest products to hit the outdoor world: Ultra Siliconised Nylon Stuff Sacks. If your gear needs to be feather-light, these stuff sacks are a "must have". Made of rip-stop nylon that's three times lighter than standard fabrics Silicone impregnated fabric is waterproof to 2.8 psi (2000 mm) Waterproof finish won't peel off over time like standard stuff sack coatings. Fabric has a slippery finish for easy packing. Webbing pull handle on bottom. Uses the smallest possible cord and cord-lock for top closure. Bar-tack reinforced in all stress points. All seams are double stitched for extra strength