CamelBak: LIGHTEN IT UP The Hydrobak™ Light carries essentials and a light layer so you can carry on. Durable and ventilated materials make this pack perfect for any adventure. FEATURESLIGHTWEIGHT AND DURABLE MATERIALSAIR SUPPORT™ BACK PANEL WITH BODY MAPPING TECHNOLOGYVENTILATED HARNESSSECURE ZIPPERED POCKETHELMET CARRYADJUSTABLE STERNUM STRAPREFLECTIVITYMEN’S SPECIFICATIONSTOTAL CAPACITY: 2.5L : 150 CU INCARGO ONLY: 1L : 60 CU INPACK WEIGHT: 170 G : 6 OZMEN’S FIT RANGETORSO38-53 CM15-21 IN