"This backpack offers every conceivable innovation all prime features in one design;600D polyester and nylon construction. Top storage compression-molded brushed optics compartment; headphone port; padded sleeve for up to 17"; laptop; cable zipper pulls allow you to lock and secure main compartment. Mid-body access flap includes an inner organizer; and compartment at bottom has drainage ports for wet or soiled items (great for shoes); interior printed lining and plenty of pockets; details; metal accents and tie downs. Ergonomically-designed adjustable padded shoulder straps with buckled sternum strap and dual mobile electronic holsters. Removable padded waist strap with extra pockets; compression molded back panel with embossed channels for airflow; rubberized bottom for moisture protection. 69% nylon; 31% polyester mill #92060"