Dri-Power wicks away sweat to keep him drier Antimicrobial odor control helps keep socks fresh Arch support delivers a snug, secure fit Soft, cushioned sole provides impact protection Durable yarn in the heel and toe for reinforcement where he needs it most Ventilated mesh fabric for enhanced breathability Size sorting system for easy pairing in laundry Fits boys medium sock size 7-8.5 and shoe size 9-2.5