The Le Petit is a narrow jet helmet in vintage design. Features The lining is of high quality, removable & washable Consists of Dyneema Carbon Aramid Fiber 2 helmet shells Thermoset material Very light, shockproof & robust Quick Release System Specifications Weighs about 900g XS = 53 / 54cm S = 55 / 56cm M = 57 / 58cm M + = 58 / 59cm L = 59 / 60cm XL = 61cm The circumference of the helmet shell is 81cm in sizes XS, S, M & M +. The scope of the helmet shell is 83cm in the sizes L & XL. Note Please be aware, as long as nothing else is written in the item description: All helmets will be delivered only with the ECE certification by default, even if it is shown differently. all helmets that have a visor will be delivered with a clear visor, even if it is shown differently.