American Tactical's RUKX Gear products are manufactured for maximum durability. This particular tactical 3 day backpack is designed to keep your gear protected from even the harshest of environments. Additionally this pack features a premium back relief panel and is hydration pack compatible. The pack is reinforced with heavy duty non rust zippers and a 600D polyester. The dimensions are 16"x 10"x10" and will hold approximately 1531 cubic inches of gear and items.