Hydrapak Contour 1.5L Hydration Bladder for the Lower Back. Waist packs have become a popular accessory for cyclists, hikers, and competitors, making it easier to store essential gear. The innovative Contour hip reservoir complements most hip and waist packs and impresses with its lightweight, durable design and compact size, fitting even in the tightest compartments. With special Shape-Loc grooves, the movement of water is controlled to ensure stability on bumpy or challenging trails. The versatile Contour reservoir combines functionality and comfort. Its 3D base, Shape-Loc ribs, and side opening ensure a secure fit in various bags. The ergonomic cap makes filling with water or ice easy and is particularly convenient thanks to the flexible tab. The Comet valve closes automatically to prevent leaks, and the magnet on the HydraFlex hose allows for easy attachment. Additionally, the reversible drying plug enables thorough cleaning and quick drying.