Macon 2.0 cycling helmet, EPS foam liner, MIPS shock protection system. Matte black. Size guide: Small 52.5 to 55 cm Medium 55 to 59 cm Large 59 to 62 cm Bern offers a new version of its iconic bicycle helmet, designed around the strengths that have made it a success, with classic but modern styling, reinforced protection and improved comfort. It will delight you with its well thought out design. The helmet has a top ventilation system and two 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, brain damage is reduced.