Hybrid shell construction blends a durable exterior with a lightweight in-molded shell for durability where you need it most while keeping the helmet light, Zonal Koroyd coverage for lightweight, energy-absorbing and ventilated impact protection, MIPS Protection System reduces rotational forces caused by angled impacts to the head. BOA 360 Fit System offers the most adjustable fit with the turn of a dial for on-the-fly micro-adjustability, Available in Round Contour Fit to better match rounder head shapes