The Anon Define Helmet and Tracker Goggle is the perfect integration for a fun day on the slopes. Endura-Shell Injected Vented ABS Construction which ensures long-lasting durability and ding-resistant strength so your little rider can build up their arsenal of tricks with confidence. The Boa Fit System gives them the opportunity to dial in the perfect fit so that you're little one is comfortable all day long. Strapper Keeper technology keeps the Anon Tracker in flawless alignment for the perfect on-the-face placement. Fidlock Snap Helmet Buckle uses a magnetic closing system that allows your child to unbuckle with one-hand, which means less time fiddling with your helmet. Passive Ventilation draws fresh air in the front and pulls moisture out the back. It'll even help regulate fog forming on your goggles. The Anon Tracker Goggle is the original grom goggle. These goggles have a Cylindrical Lens which offers reduced peripheral distortion. To help keep their face warm on those chilly winter days on the slopes is the Dual Layer Face Foam which creates a solid seal to keep the warmth in and the snow out. A Full Perimeter Channel Venting system keeps the goggles clean and fog-free so they will be seeing better and riding better on the slopes. Integral Clarity Technology (ICT) is an anti-fog treatment that delivers crystal clear vision. The Anon Define with Anon Tracker is seamless integration.