Built specifically to improve bike handling and reduce muscle strain, the hydration pack has optimal weight distribution thanks to the a low center of gravity. The Thule ReTrakt hydration hose has a unique magnetic design which allows the hose to automatically snap back in place in between sips. This means you can stay hydrated and still keep your eyes on the trail ahead. The hydration backpack's lightweight, ventilated materials ensure a comfortable ride, and the 6L storage can fit tools, clothing, food, and other items.