Bicycle integrated riding helmet $ 14.92 Product NameIntegrated bicycle helmet [Model] H-068, adult helmet, both men and women. [Size] L/one size, head circumference 54-62cm, head width 17cm, head length 21.5cm, with adjuster knob, can adjust the head circumference size. [Materials] The US imports EPS foam + imported PC sheet is integrally formed, built-in high-grade lining, imported nylon webbing and PP material regulator.