Twelve liters of total capacity breaks down to three liters in the Crux reservoir and nine liters of organized cargo space across multiple compartments. The MULE 12 represents CamelBak's longest-running mountain bike pack design, updated with the Air Support back panel that uses body mapping technology to channel ventilation exactly where heat builds up. If you've been riding with an older MULE, the redesigned version keeps what worked while addressing the fit and breathability issues that mattered most to riders who were packing this thing for all-day sessions.

The Air Support back panel creates structured air channels that don't collapse under load, which means ventilation stays consistent whether the pack is half empty or stuffed full for a backcountry shuttle. The 3D vent mesh harness extends that breathability across the shoulder straps without adding bulk. A removable waist belt gives you the option to lock the pack down for technical terrain or strip it off when you want maximum freedom of movement. The magnetic tube trap keeps the hydration hose positioned where you can grab it without fumbling, and unlike clips or loops, the magnet releases instantly when you need a drink.

Storage organization centers around integrated carry pockets that dedicate specific space for tools and repair essentials instead of tossing everything into one main compartment. The stretch overflow pocket on the exterior swallows a rain shell or arm warmers when temperatures shift, and helmet carry straps let you secure your lid to the outside when you're hiking a section or grabbing lunch mid-ride. The design sits above your natural waistline so the pack doesn't interfere with pedaling or shifting your weight on descents.... Read More