Bring the essentials with the minimalist Shuttle 6L bike hydration pack. The two-liter hydration reservoir with bite valve sits neatly in a backpack with cooling comfort thanks to the breathable mesh back panel and shoulder straps. Sunglasses stay protected in the fleece-lined pocket and a dedicated sleeve provides easy pump access. An updated recycled poly outer is rugged and sustainable and the sternum strap features a rescue whistle. The Shuttle 6L has a home for everything you need and nothing you don't. Features Phaser bite valve Breathable air mesh back panel and shoulder straps Fleece lined sunglass pocket Internal pump sleeve Integrated rescue whistle / sternum strap Dimensions 360 cubic inches 6L 17 x 7 x 2" 43 x 18 x 5cm 1 lbs. If hand washing is not going to do the trick use a front loader washing machine. To ensure your backpack doesn't get tangled place inside a pillowcase or mesh bag before washing. Always use cold water mild soap and run on a gentle cycle. Never bleach your pack. Hang to dry in a warm but shady place ensuring both inside and out are dry before storing.