This helmet is as light as it gets for alpinists and climbers moving fast. Built with EPS foam that's been co-molded with a polycarbonate shell, the Black Diamond Tracer helmet offers excellent structural integrity. Plenty of vents provide good airflow and the top vents are mesh covered to keep debris off your head. It's available in three sizes, each with a one-handed quick-adjust system. CE and UIAA-certified. Features: Three sizes (adult 49 cm-63 cm) for a great fit One-handed micro-adjust system is quick & secure 235 g equals featherweight protection for ice and rock climbing Colors: Slate Gray, Pacific Blue, BD Orange, White