HYDRAPAK reservoir bladder and drink system includedSleek Air Flow profile with multiple organization pocketsPosh top drop-in audio pocket with headphone exit portMulti-use larger main compartmentBottom zippered rain hood pack coverAdjustable padded shoulder straps and hide-away waist beltDeluxe back padding with air flow channels for ultimate comfortSpecifications: 8" H x 13" W x 19" D1976 Cu In/32L2 Lbs/09 Kg600d poly PU2, 4240d dobby poly PU2, 400d nylon PU2All items are sold individually unless specifically described otherwise in the product description