●Head circumference: 22.4 - 24.4 inches (57 - 62 cm), Blue ●Materials: Sponge + mesh ●【EASY TO USE】:Freely replace and remove, very easy to add cushioning and reduce the chance of damage during exercise ●Wide range of uses: Suitable for all kinds of helmets, such as bicycles, electric vehicles, motorcycles, etc ●Note: If the product has dirt or damage during the packaging and transportation, please contact us freely. We will give you a replacement or refund