Designed for aggressive trail riding and Enduro racing, the Thule Rail hydration packs will keep you hydrated and comfortable on the trail. Constructed with a low center of gravity, stability rails and a linear-pull chest strap, these mountain biking hydration packs offer ultimate stability by eliminating movement while descending aggressively, jumping or taking sharp turns. Thule Rail integrates the unique magnetic Thule ReTrakt hose that's always right where you want it. After drinking, the ReTrakt hose returns securely to its place so you can keep your hands on the bars and your eyes on the trail. Each mtb pack features a 2.5L HydraPak reservoir includes a slide closure for easy cleaning and a locking bite valve to prevent unintended spills before or after the ride. Easily attach any assortment of knee and elbow pads along with full-face helmet or removable chin bar to the Thule Rail. Whether a race requirement or simply peace of mind on an exposed backcountry ride, the removable Koroyd spine protector in the Thule Rail 12 Pro exceeds CE certification standards for protection without weighing you down.