The Mini M.U.L.E.® is a pack with grown-up features for young adventurers. It features an easy to load and refill 1.5-litre Crux™ Reservoir that provides 20% more water per sip for faster hydration, an Air Mesh back panel, a safety whistle attached to the sternum strap, a tool organiser pocket and zipped compartments for layers and essentials.Features Torso fit range: 30-40cm The new Crux™ Reservoir delivers 20% more water per sip Breathable Air Mesh back panel for a lightweight, comfortable fit Ventilated harness offers air flow and cushioning to maximise comfort and breathability Sternum strap with safety whistle Bike tool organiser pocket Stretch overflow storage for your raincoat or extra layer 1.5-litre Crux™ Reservoir: Easy open/close leak-proof cap Leak-proof on/off lever lets you access water when you want it and prevents leaks when you don't Ergonomic handle for one hand fill Reservoir baffle creates a low profile fit for easy pack loading and less water sloshing 100% BPA/BPS/BPF free HydroGuard™ antimicrobial technology inhibits the growth of bacteria in the reservoir and tube (does not protect you from bacteria or other disease-causing organisms) Big Bite™ Valve is an easy bite and sip valve that self-seals after each drink, eliminating annoying drips Quick Link™ System makes it easy to remove the reservoir from your pack by disconnecting the drink tube with an auto shut off to prevent leakage CamelBak® Got Your Bak Guarantee™ – if they built it, they'll Bak it™ with their lifetime guarantee