HYDRAPAK reservoir bladder and drink system includedSleek Air Flow profile pack with separate hydration pocketInternal posh top drop-in audio pocket with headphone exit portMulti-use large main compartment and posh valuable pocketDual side mesh accessory pockets and expandable front mesh pocketAdjustable padded shoulder strap with sternum strapDeluxe back padding with air flow channels for ultimate cool comfort8" h x 9" w x 18" d1296 CuIn/21 L1 Lbs/05 Kg600d poly PU2, 420d dobby poly PU2, 400d nylon PU2Limited lifetime manufacturers warrantyAll items are sold individually unless specifically described otherwise in the product description