Ultralite, waterproof Nylon stuffsac with roll top closure. Ideal for organizing outdoor gear in potentially wet environments when the ounces count. Fits up to: 2.5 L (XXS), 4 L (XS), 7 L (SM), 10 L (MD), 15 L (LG), 20 L (XL), 30 L (XXL). Size: 4.7" x 7.9" (XXS), 5.5" x 9.8" (XS), 6.7" x 11.8" (SM), 7.5" x 13.8" (MD), 8.7" x 15.7" (LG), 9.4" x 17.7" (XL), 11" x 19.7" (XXL). Wt: 1.4 oz (MD).