"Solid PC shell with EPS foam for great buffer action, detachable cycling goggle to protect your eyes from glare and keep wind and dust out, great for outdoor cycling and motorcycling. Feature: SAFETY GUARANTEE: Integrated PC shell for impact resistance and high density EPS foam for great buffer action, double protection prevent unexpected injury during sports. GOGGLE: Built-in cycling goggles to protect your eyes from glare while keep dust and wind out, and easy to detach with magnetic suction design. VENTILATION: 4 intake and exhaust vents create an air circulation system to keep head cool and comfortable. ADJUSTABLE: Rotate the adjustor behind to fit your head and adjust the nylon webbing for proper tightness. GREAT EQUIPMENT:  Lightweight and practical helmet for cycling and motorcycling. Specification: Material: PC & EPS  Color: Black-red / Black-green / Black-blue / Red-white / Grey / White (optional) Head circumference: 54-60cm / 21.2-23.6in Weight: Approx. 300g / 10.5oz Package weight: 480g / 16.9oz Package List: 1 * Helmet  1 * Lining "