Mavic 2015 CXR Ultimate Road Bike Helmet (Black - L) Lightweight construction: 250 grams (size M) CE and CPSC certified Air disbursement system that allows the air to pass smoothly around the helmet 28 Clima Vents for a perfect cooling effect for your longest rides Ergo Hold SL Retention System / CX Shape / Ergo Shape / Hot Ride Weight: 250 grams (size M)