ROCKBROS Cycling Helmets Adjustable Bike Helmet Adult Bicycle Helmet for Men Women Lightweight Comfortable for Youth Bike Accessories

IMPACT RESISTANCE: The bike helmet for men women is made of high-density PC shell and EPS foam. The durable shell can effectively protect your head and the soft lining can play a shock-absorbing and cushioning role, both can improve the safety of cycling. LIGHTWEIGHT HELMET: Our bike accessories for adult bikes is light weight, only about0.55lb（250g）, making it lighter and stress-free to wear. In addition, this helmet is available in a variety of colors to meet your needs. ADJUSTABLE SIZE: This mountain bike helmet is available in two sizes and can be freely adjusted according to the size of the head circumference. Our bike helmet can 360° rotation adjustment, you can easily complete the adjustment with one hand. Size M: 21.65-22.83 inches (55-58cm), Size L: 22.83-24.02 inches (58-61cm).