Combination of water resistant 840D ballistic nylon twill and 420D honeycomb nylon with abrasion resistance for durability Custom helmet carrier unobtrusively hides into front of pack when not in use Self locking waterproof zippers Padded laptop pocket, internal organizers and external side pockets Sternum straps with cord-management system and reinforced straps Meshed backed TPR logos and trimming EVA padded front panel, shoulder straps and air mesh back with Astars logo Hideaway waist belt Secured main compartment closure flap Dimensions 18.5H x 8.25W x 12.25L (47cm H x 21cm W x 31cm L -- 27 Lt)