Function: Isosceles Storage System extra large backpack carries boots, helmets, pads, shin guards, armor and other gear; Fabric: Super tough, water resistant coated 1680 ballistic nylon and polyester ripstop; Side boot pockets carry boots and shin guards; Side pockets with air/water drainage grommets; Coated water resistant extra large central compartment for gear; Water-resistant tarpaulin bottom; Closed cell foam padded back with ID holder; Contoured adjustable neoprene comfort shoulder straps; Adjustable waist belt and sternum strap for comfort, weight distribution and stability; Front vertical zipper provides extra access to a large central compartment; Zipper side pockets with reflective stripe; Comfort grip rubber top handle and padded foam front grip handles; Volume: 4900 cu in / 80 L