HydraStorm Tempest PATENTED! # 6,085,947 It's designed as a "user-friendly" pack and contains our 100 oz. reservoir with exterior fill port. It also has a top carry handle, back assist handle, and full shoulder strap system that fits easily into any pack or vest. It's great for upgrading any pack but can also be used as a stand alone system. -Made with 1000 denier NyTaneon -Fully stowable shoulder system for ease of use with any pack or bag -Excellent for bags such as the soldier MOLLE system Average Dimensions: 16 x 8 x 1 Wt: 20oz.