The Toppen, model 77, is a protective helmet designed for use by individuals with balance, seizure, mobility, or cognitive disabilities. This lightweight, ventilated helmet has a nylon outer shell and a cotton lining. The chin strap has a thread-through buckle. SIZES: Infant to adult sizes. This helmet can be machine washed in cold water and line dried. DIMENSIONS: For head circumferences 18,19,20,21,22,23,or 25 inches. COLOR: Blue exterior with a red lining.