The redesign of the CamelBak M.U.L.E 12 Hydration Pack 100 oz is exciting. Biking and hiking adventures are awesome with the M.U.L.E® 12 hydration pack. Its Air Support Back Panel is designed with body mapping technology for maximum ventilation on the hot spots of your back. The removable waist strap gives you added stability when you need it and the mesh harness is lightweight and breathable for all-day comfort. Not only does it have a quick stash external pocket for that wet rain jacket, but you can also stow and secure a helmet. Keep your belongings organized in the various cargo and carry pockets and is made with recycled materials. The premium hydration bladder with the Quicklink System ensures you get all the hydration you need while you are on the move, easy peasy.