Fox Proframe cycling helmet The Fox Proframe helmet is the lightest and most breathable in the Fox collection that has ever been created by them. It is equipped with the latest technologies, which are dominated by the MIPS impact protection system (absorbs and transmits energy on impact so that the head is as protected as possible) or the Varizorb EPS antimicrobial inner liner, which provides increased protection by distributing impact pressure over a wider area. The Fidlock SNAP buckle allows quick and easy tightening of the helmet, even with gloves on. The helmet is compatible with cycling goggles. A chin bar that meets the highest ASTM standards will come in handy for downhill. 15 large and 9 small vents ensure the best air circulation, keep the head dry and this handy system regulates the moisture itself for the most comfortable ride.