BlackHawk HydraStorm Tempest is a user friendly system can be used to add hydration to any pack, but can also be used as a stand alone. Features: Drink system protected by Microban® antimicrobial technology. Market proven bite valve and patent pending quick disconnect system. Back assist handle makes refills quick and easy. Shoulder strap system is fully stowable for use with any pack or bag. External Fill Caps in matching colors.