The Ultra-Sil Stuff Sack is an ultralight but durable solution using a 30D siliconized Cordura fabric. Ideal for organizing gear in your pack or bag, these stuff sacks incorporate a reinforced pull handle on the base, a durable pull tab at the top and are available in several great colors. The slippery exterior means they slide down into tight spaces easily. Best use: Pack organization. Made of 30D Diamond Rip Stop Siliconized Cordura. The fabric is impregnated with silicone to make it waterproof to a hydrostatic head of 2000mm. The fabric has a slippery finish for easy packing. Reinforced pull handle on the 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. Dimensions. Volume: 13L.