You need a low and stable load on your mountain bike, and you need the gear you need but nothing more. In swoops the Syncline 12L Hydration Pack, feature-rich and just the right size. This hydration pack is sized for everyday riding, with storage designed specifically for everything from your helmet to your tire pump. Dakine included its lumbar reservoir to keep you hydrated without throwing you off balance, plus nifty features including a fleece-lined pocket for your sunglasses, an integrated rescue whistle, and a safety light attachment. The Syncline is also compatible with the DK Impact CE-certified Spine protector, sold separately.