Our Ultra-Sil® Stuff Sacks are super strong and lightweight. We use ultralight ripstop Cordura fabric in a range of colors. Made of 30D Diamond Siliconized Cordura®. The fabric is impregnated with silicone to make it waterproof to a pressure of 2.8 psi / hydrostatic head 2000mm. Fabric has a slippery finish for easy packing. Reinforced 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. Comes assorted in several great colors: Blue, Gold, Red, Green, Grey & Black. •Note: seams are not tape-sealed; therefore this product is not waterproof – only water resistant.