Hit the road or trail with this sleek, versatile pack that keeps gear organized???and you fully hydrated. 600D poly PU2/420D dobby poly PU2/400D nylon PU2 70 oz/2.0L HYDRAPAK reservoir bladder and drink system made of FDA-approved polyurethane Air Flow design profile pack with separate hydration pocket Internal top drop-in audio pocket with headphone exit port Large multi-use main compartment with valuables pocket Dual side mesh accessory pockets and expandable front mesh pocket Adjustable padded shoulder straps with sternum strap Deluxe back padding with air flow channels for cooling comfort Dimensions: 8'h x 9'w x 18'd Capacity: 1,296 cu. in./21L Weight: 1.0 lb./0.5kg *Bags not intended for use by children 12 and under.