MIPS®-Equipped MIPS stands for Multi-directional Impact Protection System, which is a leading slip-plane technology inside the helmet designed to reduce rotational forces that can result from certain impacts. 3 Shell Sizes Typical offering requires additional padding sizes to accommodate all head sizes. Anti-Bacterial Liner Washable liner with quick-drying materials. Inhibits growth of odor-causing bacteria and fungi. MIPS energy management system Lightweight polycarbonate/ABS shell construction Removable/Washable anti-bacterial interior Velocity Flow Ventilation system for maximum cooling Integrated roost guard 3 shell and EPS sizes for a personalized fit Padded chin strap with D-ring closure Fully adjustable Flying Bridge Visor with air intake vents DOT Size :57 -58cm