Siliconized nylon stuff sacks are super strong yet incredibly light. They're a great way to keep your backpack, kayak, or luggage organized.. . Made of 30 denier diamond siliconized Cordura. Three times lighter than typical stuff sack fabrics. The fabric is impregnated with silicone to make it waterproof to a pressure of 2.8 psi. Fabric has a slippery finish for easy packing. Reinforced pull handle on bottom. Uses the smallest possible cord and cord lock for top closure. Measures: 9.5 x 19 in.. Volume: 1400 cu. in. 20 L.