Today the Camelbak Mule 12 backpack takes a step forward so you won't fall behind. It's the same reliable Mule as always, but a few slight changes have been made to the fit to make it even more comfortable. Both the men's and women's models include smart stowage options, Air Support back panel, lightweight materials, and maximum ventilation to keep you cool (and cool) while you pedal. Air support back panel. Helmet holder. Integrated tool holder. Tube trap magneticot. Load stabilizing belt, detachable. Rear panel Air support. Color: Gray.