Cooling Helmet Liner | Anti-Pressure Silicone Ventilation SystemPremium Comfort & Protection High quality silicone material: This breathable silicone helmet liner is made of durable silicone, ensuring softness and comfort. The material has excellent breathability, keeping your head cool and dry even after long term use. Custom fit: This helmet pad is designed to fit comfortably inside most helmets, ensuring a snug fit. Its flexible design adapts to the shape of your head, providing optimal comfort and support.