Waist packs have become the new go-to choice for carrying cycling essentials on hot laps, shorter rides and race days. Designed to be lightweight and rugged with a slim profile to fit in smaller spaces, our innovative Contour (TM) Lumbar reservoir is a perfect hydration upgrade for most lumbar and hip packs. Equipped with performance features and Shape-Loc baffles to stabilize water movement, it 's ready to tackle rowdy and steep lines. HydraPak Contour Lumbar 1.5L Reservoirs | Crystal (Clear) | Christy Sports