In order to improve bike handling and reduce muscle strain, the hydration pack is constructed with a low center of gravity for optimal weight distribution. The Thule ReTrakt hydration hose has a unique magnetic design which allows the hose to automatically snap back into place in between sips. This means you can stay hydrated on the trail without having to slow down. The lightweight, ventilated materials ensure a comfortable ride, and the 3L storage allows you to bring tools, snacks and other small items.