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. In addition, we've supplied smart storage options, with an overflow pocket for an extra layer or wet rain jacket. We also supplied a removable stability belt for added flexibility and comfort. Another key addition is our Magnetic Tube Trap™ that works with all of our reservoir tubes. We've included Air Support™ Back Panel, lightweight materials, and max ventilation to keep you feeling and looking cool on the trail. Repurpose Gold Sustainability Badge: Made with recycled materials, made with safer chemicals, and designed to preserve resources and diminish disposables. LIGHTLY USED. BLADDER NOT INCLUDED.