Grizzly & Black Bear Approved. Lighter for backpacking when every ounce counts. Larger capacity for the space you need. Extra wide opening provides full access for loading, unloading and finding items. Innovative patented design so you can open and close the lid without tools. Super rugged transparent poly-carbonate housing resists impacts without shattering. Built in guides keep tie down straps in place so extra carrying case in not needed to attach to backpack. BearVaultA(R) Model BV450 Weight 2 lbs. 1 oz. (0.94kg) Food capacity / Interior volume (usable space) 440 cubic inches (7.2 ltr) 4 days Easy access wide opening Yes (38 sq. in.) Transparent for easy food selection Yes Tool free operation Yes Easy to attach to backpack with built in strap guides Yes Easy to slip into backpack Yes Material Super rugged polycarbonate housing Dimensions 8.7in. dia. (22.1cm) x 8.3in. (21.1cm)