★Meets or exceeds FMVSS-218, DOT safety standards..And each batch of helmets is subjected to random quality checks to ensure the highest quality of the products you receive. ★ Suitable for head size: S: 52-53cm, M: 54-55cm, L: 56-57cm, XL: 58-59cm, helmet shell size length 35cm (13.7in) X width 24cm (9.4in) X height 25cm (9.8in) ★ High-strength ABS shell , durable, adjustable chin strap (fast release), fully removable lining, easy to clean, soft and comfortable, breathable. ★Personalized color painting pattern,Streamlined Aerodynamic Design Reduces Wind Noise and Drag.Keep the sun out of your eyes with the removable and adjustable sun visor, ideal for any terrain. ★ Suitable for adults, teenagers, boys and girls, for locomotive / bicycle / scooter / karting / ATV / endurance race / skiing / downhill / etc. Beautiful helmet is the best gift for children，husband, family, lover.