The kids' Windham WaveCel Helmet pairs everyday hardshell durability with the advanced impact protection of WaveCel technology. WaveCel is a collapsible cellular structure that lines the inside of the helmet. It's designed to flex, crumple, and glide to reduce rotational and direct impact forces. A 360° BOA® Fit System offers a quick, micro-adjustable fit with the turn of a dial, and the Fidlock® magnetic helmet strap buckle allows for easy one-hand operation, even with gloves. Polartec® Power Grid® fleece liner and ear pads maintain quick-drying warmth for all-day comfort. Sleek fixed vents keep the air flowing for fog-free goggles.