Promote the safe development of gross motor functions with this comfortable, durable helmet size right for small children. This fluorescent blue helmet will help children when they?re biking, skateboarding, riding a scooter, roller-skating, and more. Use this helmet to teach children about the importance of wearing a helmet and other safety tips when using their wheels. Complete with adjustable chin straps. Fits most children with a head size of 19.5 to 21.5 inches. 10 vents. Clean with mild, soapy water.