Thrasher lightweight bicycle helmet is designed for children. Suggested age range: 5-8 years old. Suggested head circumference: 19.63-22.0 inches Full Schwinn 360° Comfort featuring an adjustable dial fit knob and full-range padding for the perfect custom fit. Two microshell layers and full-coverage EPS foam construction provides lightweight durability Easy-adjust dial system provides a custom fit with a twist of the dial, Adjustable side straps allow you to fine tune fit and comfort and detachable visor helps reduce glare Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older