The CamelBak Flashflo LR Hydration Waist Pack is the perfect pack for the fitness walker or hiker who prefers waist mounted hydration. Includes the 50 oz. 1.5 L Antidote Lumbar Reservoir BPA free. Antidote reservoir features quick seal cap, lightweight fill port, low profile design for unmatched stability, Big Bite valve, HydroGuard technology, PureFlow tube, and easy to clean wide mouth opening. Lightweight and comfortable. External zippered pocket for storing wallet, phone, keys, and other small essentials. Front and back reflectivity increases visibility in low light conditions. Made from 70D miniripstop and 230D taffeta with DWR durable water repellent finish. Mesh hip belt and Velvetex back panel for comfort.