The Retrospec Silas Adult Bike Helmet With Light Is Available For Both Men'S And Whether you're commuting to work or traversing the back alleys of city streets, bike with confidence knowing Retrospec's Silas bike helmet has you covered. Literally. This lightweight bicycle helmet is constructed with a thin, tough plastic outer shell and EPS foam body to protect you without weighing you down. A helmet's fit is just as important as its materials when it comes to safeguarding the rider, so we equipped this cycling helmet with an ergo knob adjusting dial for a snug, customizable and comfortable fit every time. Silas is well-ventilated with 24 vents to guide air over and through the bike helmet, evaporate sweat, and cool you down as you ride. Silas is engineered to protect and empower you with the peace of mind of having selected the best value bike helmet around. FIT: One size fits most cycling helmet. Easily adjust from 54cm to 61cm to fit sizes small, medium, and large (not designed for XXL/62cm/24. 5 inch and up.) COMFORTABLE: Silas bike helmet is padded, lightweight and aerodynamic to slice through headwind. BREATHABLE: 24 vents and contoured design with inside air-channels force ventilation through and around the bicycle helmet for a cool, comfortable ride. LED LIGHT: A built-in 4-LED 3-function flashing safety light keeps you seen and safe on the road. SAFE: Constructed with high quality EPS encased by PVC for top-tier protection. All Retrospec bike helmets comply with the U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 12 and Older.