Our d.O.T. And ece daytona retro jet helmet in the dull black finish, meets and exceeds d.O.T. Fmvss 218 and ece 22r06 standards features an outer anti-scratch clear shield. Also has a quick release lock retention system one finger release lever for easy detachment and a removable, hand washable interior moisture wicking fabric . Bluetooth compatible. Cloth draw string bag included. Sizes range from xs-xl. Details meets and exceeds d.O.T. Fmvss 218 and ece 22r06 standards. With 2 different shell sizes, you're sure to get that proportionate fit outer anti-scratch clear shield. Optional outer replacements colors available, click here . Nylon strap retention system with quick release lock. Quick release lock with one finger release lever for easy detachment. Moisture wicking fabric keeps your head cooler and more comfortable. Removable, hand washable interior. Eyeglass compatible. Dull black finish. Bluetooth compatible. Bluetooth installation pairing. Also includes cloth draw string bag. Dimensions helmet size cm in hat size in 3xs 41-42.5 Cm 16 1 8 - 16 3 4 5 1 8-5 3 8 2xs 43-44.5 Cm 16 7 8 - 17 1 2 5 1 2-5 5 8 xs 45-46.5 Cm 17 5 8 - 18 1 4 5 3 4-5 7 8 s 47-49 cm 18 3 8 - 19 1 4 6-6 1 8 m 49.5-51.5 Cm 19 3 8 - 20 1 4 6 1 4-6 1 2 l 52-54 cm 20 3 8 - 21 1 4 6 5 8-6 3 4 xl 54.5-56.5 Cm 21 3 8 - 22 1 4 6 7 8-7 1 8 2xl 57-59 cm 22 3 8 - 23 1 4 7 1 4-7 3 8 3xl 59.5-61.5 Cm 23 3 8 - 24 1 4 7 1 2-7 3 4 4xl 62-64 cm 24 3 8 - 25 1 4 7 7 8-8