FRAME A rigid PUR frame for flexibility at low temperatures. Anti-UV colours. Small fit. Suited to children's helmets. LENS A clear polycarbonate lens. Anti-fog. Anti-scratch treatment. There is no optical distortion. Complete protection from UV rays. VENTILATION SYSTEM The A.V.S. Ariete ventilation system. Open filters. FOAM 2 layers of foam consisting of: 1 ultra-soft technical open-cell foam layer. 1 hypo-allergenic foam layer in contact with the skin. ELASTIC STRAP Non-slip silicone beads. A double buckle for quick adjustment.