Macon 2.0 cycling helmet, EPS foam lining, MIPS shock protection system. Matt green. Size guide : Small 52.5 to 55 cm Medium 55 to 59 cm Large 59 to 62 cm Bern offers us the new version of its iconic bicycle helmet, designed around the assets that have made its success, with a classic yet modern style, reinforced protection and improved comfort. It will delight you with its sophisticated aesthetics. The helmet has a top ventilation system and two high-performance front inlets to ensure maximum comfort. Now lighter (approx. 375 g) it is equipped with MIPS technology for maximum safety. In the event of a violent impact, trauma to the brain is reduced.