"Flip-Top-Lid" design prevents strap tangling * 30D Diamond Ripstop Siliconized Cordura * 4 straps for even compression. Extra long straps so these sacks can really be filled to capacity * Bar tack reinforced stress points. Pull handle on the bottom. Slippery finish for easy packing * XS: 5.5" x 14", 2.4 oz, 6 L to 2 L; SM: 7" x 16", 2.6 oz, 10 L to 3.3 L; MD: 8" x 18", 3.0 oz, 15 L to 5 L; LG: 9" x 20", 3.3 oz, 20 L to 6.5 L; XL - 10.5" x 23", 4.1 oz, 30 L to 10 L