Boeri Apollo Helmet Hands down the best kids helmet in the marketplace. The Boeri Apollo was developed specifically for the growing young skier or snowboarder, complete with a lightweight full shell, free flow venting, jaw piece compatibility, and a key versatility feature, Boeri’s Microplast precision Sizing System (MPS™). This room to grow feature works by strategically placing pads into recessed zones of the helmet, creating a snug yet comfortable fit, while allowing the pads to be removed, relocated, and reattached selectively to customize every fit. Features: Specifically designed for the growing young skier or snowboarder;Jaw piece compatible Lightweight full shell;Medium = 52-53 cm Free-flow venting Boeri's Microplast precision sizing system Removable pads