The Camelbak Mini M.U.L.E Hydration Pack 5L (1.5L Bladder) Camo is a kids-sized daypack with grownup features, including a 1.5L Crux reservoir for faster sips, a bike tool organizer, zippered compartments, and stretch overflow storage for layers; made from recycled materials with a comfortable air mesh back, reflective accents, and a built-in safety whistle to keep young explorers visible and prepared on the trail.