The MOD1 PRO helmet, enhanced with Dura-Matter construction, offers superior durability without compromising the sleek, low-profile design of the original MOD1. Inspired by classic skate style, this helmet provides robust protection and is available in various fits and sizes to ensure a perfect match for any rider.Oakley Mod 1 Pro Features: Dura-matter: our most robust construction method, using an injected molded dura-matter shell applied over an eps foam liner. Dura-matter is dent and ding resistant, offering the highest level of durability. skull matrix: mips® and boa® technologies merge into a unique single system. Skull matrix is designed to provide a more adaptive fit to help enhance comfort for an improved riding experience. fixed ventilation: fixed vents in front of helmet allow for goggle ventilation while the fixed vents on top of the helmet help keep the riders cool. fidlock® buckle: seamless magnetic functionality lets you fasten your helmet with gloves on. removable liner/earpads: allows for easy cleaning as it is machine washable, adaptable for various weather conditions, and provides freedom to wear the goggle strap underneath the helmet. astm f2040 and ce en1077 certifications. helmet travel bag included. Fits: standard: small (51-55cm) / medium (55-59cm) / large (59-61cm) / xl (61-63cm)