Crux Reservoir: 85oz capacity delivers 20 percent more water per sip with ergonomic handle and on/off lever Quick-Access Refill: External fill flap allows for fast refills without removing the reservoir Breathable Comfort: Air mesh back panel provides lightweight ventilation for long rides Magnetic Tube Trap: Keeps your hydration tube secure and easily accessible Versatile Storage: Includes external helmet hooks, two zippered pockets, and a stretch overflow compartment for extra gear