The CamelBak Kids' Trailblazer 15 Hydration Backpack has enough room for snacks, a layer or two, and all the water your whippersnapper needs for day hikes. CamelBak built the backpack's straps and back panel out of Diamond Clarus mesh for breathability and comfort, and the durable nylon pack has DWR and PU coatings for excellent resistance against water and abrasion. The hydration sleeve already has a 1. 5 liter reservoir in it so your child can start trekking right when the pack arrives at your doorstep. The reservoir features CamelBak's locking bite valve that helps prevent your little trooper from spilling any water. A top pocket, side pockets, and compression straps keep everything tidy and organized, and the sternum strap has a whistle in case your kid gets lost or in trouble out in the woods.