The Lazer Cosmo, Lazer's most advanced road helmet to date with styling to suitThe Cosmo heads up the Lazer women's collection with all the touches and details expected by the best riders in the worldThe Cosmo features new technology such as T-Pro, or temple protectionSafety is always a priority when designing a new helmet and we identified that one of the weakest points in the skull is around the temple. As a result, the Cosmo offers additional coverage at the side of the head by lowering the helmet in that areaWithout adding weight and while ensuring comfort Lazer made an upgraded extra light version of the award winning Rollsys system, called ARS or Advanced Rollsys SystemVentilation is a priority to keep the rider, cool, comfortable and prevent any loss in performance through overheating so the Z1 uses deep ventilation channels which draw air through the helmet, while keeping the gap between head and shell to a minimumClear Aeroshell included: The detachable shell, without need for any additional fixings, helps to improve the aerodynamic performance of the helmet over an open helmet whilst also covering your head should the weather take a turn for the worseWeighing in at 225 grams Medium sizeSize: Small 52-56 cm, Medium 55-59 cm, Large 58-61 cm