adjustable waist strap with zippered pockets for extra storage and side mesh strength pockets for accessories. Constructed out of light weight 600D Polyester and Ripstop with a PU coating to make the pack water resistant. Note this bag come with a 2L (H20) hydration bladder. Also included padded shoulder and sternum harness for a precise fit Features a zippered main compartment, front extendable bungee cord to hold extra attachments and side compression straps to keep everything in place. Complies with FDA. 4" D x 11" W x 18" H