What makes the M.U.L.E. 12 Hydration Backpack redesign so exciting? For starters, it's the perfect size, comes with premium hydration, and has all the features to make every bike adventure awesome. Additional smart storage options, with an overflow pocket for an extra layer or wet rain jacket. The removable stability belt provides added flexibility and comfort. The Magnetic Tube Trap works with all of Camelbak's reservoir tubes and the Air Support Back Panel gives you maximum ventilation to keep you cool on the trail. A reservoir with Quicklink System ensures you get all the hydration you need on the move, with no fuss.