Ultimate Direction 1.5L Reservoir (By HydraPak) hillmalaya Peristaltic underarm vents help regulate

Peristaltic underarm vents help regulate body temperature by pumping in cool air and pumping out warm air during natural arm movement

The Hopara is designed to provide protective cushion while maintaining a responsive toe-off for when you want to go faster

providing a convenient skin care option

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Ultimate Direction 1.5L Reservoir (By HydraPak) hillmalaya Peristaltic underarm vents help regulateOverview Whether you are searching for a new bladder or simply looking to replace a current one, the Ultimate Direction 1. 5L Reservoir holds enough fluid to keep you hydrated for hours of running. This bladder uses a top fill sliding seal for easy filling and the tube disconnects when it's time to clean. As an added benefit, the Reservoir is made with a new PEEVA material that adds durability without tainting the taste of your water. Product Details