Obo Face Off Steel is Obo's innovative penalty corner mask under the OOP brand. With this mask, you are optimally protected, you will no longer be bothered by a foggy mask and you will have a completely unobstructed view. OOP is a new brand from OBO , totally focused on the protection of the players. Many studies in laboratories, years of work and many thousands of hours have led to the safest mask that is available today. More than 80% of penalty corner defenders wear this mask. Benefits: the best protection, the safest mask on the market. Many years of experience with helmets translated into this mask. Completely free view. No more foggy mask. Good hearing. Very easy and quick to put on and take off. Officially approved by KNHB and FIH. Size L for men / women, kids A (16-18 years old). size M for older 'little' ladies and girls D to A (12-18 years old) HEAD HEIGHT Measurements from the top of the brow to the bottom of the chin PRODUCT HEIGHT From the top of the forehead to the bottom of the chin S 135-155 mm 215 mm M 135-155 mm 225 mm L 160-180 mm 235 mm