Just1 J39 helmet was developed with the primary goal of safety and comfort for the rider. During the design phase, the helmet was designed from the inside out in order to have the best possible and a radical ventilation system. Features high quality thermoplastic resin external shell 2 shell size 3 eps size J.1.e.r. emergency cheek pad removal system double d retention system new inner lining fitting for a better comfort removable and washable inner lining 8 intake and 6 exhaust vents peak extension included Specifications sizes Small shell (xs /s /m /l /xl ) from 53 to 61 cm Big shell (xl /xxl ) from 61 to 63 cm Weight: approx.1380 gr. (+/- 50g) Note Please note that as long as nothing else is written in the article description, all helmets that have a visor as standard will be delivered with a clear one, even if it is shown differently.