Fabrics: 100% recycled 210D polyester Invisible Ripstop. Back: “Hollow Back System” back: ultra-breathable back, shoulder straps and waist belt with a combination of pre-formed padding with vent channels and super-breathable mesh fabric. Pockets: On top lid | Side bellows pockets | On waist band Accessories: YKK waterproof zippers | Removable hood with heat-sealed seams and waterproof zipper. | "Roll-up" top lid with zipper | Front access to the main body of the backpack with waterproof zipper. | Side compression tapes | Two pole / ice axe holders | Additional removable storage straps (front and bottom) | Chest strap with emergency whistle. | Compatible with “Helmet Holder”. | Front daisy chain for gear