This is made of 600 denier polyester material. Thick cushioned Straps. Have molded handle, double stitched and cross stitched straps for durability, heavy duty zippers and buckles, 2 quick release buckles on either side, large expandable main packing compartment. Main compartment is 19" by 13". Expands from 5" to 10" to accommodate tactical gear. Extra front pocket with mesh inner pocket. Front organizer pocket. 3 front MOLLES straps. Opening and compartment for 2.0 liter reservoir (bladder not included).