Keen designed its Boys' Seacamp II CNX Sandal to keep your kid's foot nice and cozy whether he's stomping through a river or strolling across a sidewalk. Keen utilized its proprietary Keen. CNX technology for lightweight protection that includes a minimal heel to toe drop for natural movement, a contoured arch for underfoot support, and minimal upper construction for a comfortable fit and feel. The upper consists of polyester that you can wash, a hydrophobic mesh lining for breathability, and an Aegis Microbe Shield treatment to eliminate odors, stains, and deterioration. The Secure Fit Lace capture system helps the hook and loop strap hug your boy's entire foot instead of uncomfortably pulling at one point. The rubber sole features multi directional lugs for secure traction over slippery surfaces in the water, and it won't muck up your hardwood floors at home.