Gonex Bike Helmet, Adult Cycling Road Helmet with Safety Light, Adjustable 58-62cm, 24 Integrated Flow Vents Equipped with 3-modes Durable LED back cautious light Adjustable rotary internal regulator and comfortable cushion lining High-sided article velvet for shockproof Housing: high quality PC + Matt printing Inner casing: EPS high-density foaming,integrally molded 24 integrated flow vents to keep rider cool