Slide the Fitclip up, adjust the length of the helmet, slide the Fitclip down Microdial adjusts circumference by tightening the Stabilizer straps for a true customized snug 360 degree fit Molded grip texture Comfort Cushions deliver snug pillowy comfort Mechanically attached EPP liner delivers pro-proven protection and integrated vneting channel keep your head cool Composite Subshell is lightweight and stiff Features 3 unique shell sizes for an anthropometrically optimized fit; Mid-split dual ridge shell delivers on protection Maxvents venting throughout the helmet keeps the player cool, saving precious energy for the game Transluscent Surlyn ear covers protect the blend with the look of the helmet Secure-strap ear loops keep the chain strap in position Zinc played flat/star screws minimize rust; Screwdriver and dime friendly CSA, HECC and CE certified