Built for the unpredictability of enduro racing, the Troy Lee Designs Stage Helmet is the lightest and most versatile full-face helmet in its class. Its Polylite shell with fiber reinforcement pairs EPP and EPS foam for protection at both low and high speeds. A highly ventilated Polylite chinbar keeps airflow maxed out for all-day breathability, so you can stay cool and focused while pushing hard on the trail. Features: Dual Density EPS co-molded with EPP Mips® C2 Rotational Impact Brain Protection System EPP lined chinbar Exceeds bicycle certifications: CPSC 1203, CE EN1078, ASTM F1952, ASTM F2032, and AS/NZS 2063 .helmet-size-range { width: 100%; max-width: 500px; border-collapse: collapse; font-family: Arial, sans-serif; margin-top: 1em; } .helmet-size-range th, .helmet-size-range td { border: 1px solid #ccc; padding: 10px 12px; text-align: center; } .helmet-size-range th { background-color: #f5f5f5; } .helmet-size-range td:first-child { text-align: left; font-weight: bold; } Size Head Circumference (cm) Extra Small / Small 54 - 56 cm Medium / Large 57 - 59 cm Extra Large / Extra Extra Large (2XL) 60 - 63 cm