The rucksack is used to carry field equipment. The SOF Rucksack is Hydration System Compatible. Ten gear pouches with cinch draw strings and quick release buckles on the lids. Made of 1000 denier nylon. Cinch top inner liner for rain/gear protection. Fits standard A.L.I.C.E. Ruck Frame included with straps. Weight is 9.33lbs.