Just 1 J39 helmet was developed with the primary goal of safety & comfort for the rider. During the design phase, the helmet was designed from the inside out in order to have the best possible & 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 & washable inner lining 8 intake & 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 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.