Sturdy material: Made of sturdy shell and high quality EPS foam, reinforced foam to protect the head. Suitable head circumference: 58-62cm, suitable for adults, men, women, youth, teenagers, to the shoulder strap, easy to adjust. Applicable models: specially designed for various activities of road and mountain bikes, roller skates, crutches. Light weight: lightweight, 11 ventilation holes, keep the cool people during long-distance riding. Impact resistance: EBS liner, safe and penetration-resistant, EPS liner + Goose double-sided coating tape, soft impact resistance and high speed, provides effective protection. Bicycle Helmet - Adjustable Bike Helmet With Detachable Visor, Breathable Helmet For Road Cycling And MTB, 58-62cm Specification: Name: Bicycle Roller Skating Helmet Material: PC Shell + EPS Weight: about 130g Size (approx.): Length 22cm / 8.66in Width 17cm / 6.69in Depth 8cm / 3.15in Color: red, black, blue Application: Unisex Suitable head circumference: 58-62cm Packing list: Helmet * 1