Thumb-operated on/off lever is easier than ever to operate with one hand Compact Slide-Seal opening aids one-handed filling, removes bulkiness, slides into packs easier and seals securely Seamlessly integrates with new HydraClip reservoir hanger in packs for secure carry Exceptionally secure hose magnet system Dual baffles flatten the profile and improve control when filling, pouring and carrying the reservoir Item Dimensions: 0.39H x 7.68W x 13.39D ; Item Weight: 0.34lb