Reliable PE material, durable and reliable for long-term application. workmanship, smooth surface, will not hurt the hair. Wide application range. Suitable for factories, welding, construction sites, automobile assembly, repair and maintenance processing, industrial manufacturing, etc. Features - Color: Grey -Material:PE - Size: 19.00X18.30X8.20cm/7.47X7.19X3.22in -Fine Material: The hat liner is made of PE material, which will be durable, sturdy and practical for your use -Practicality: The hat accessory is creative and highlight your personal style to wear this comfortable baseball cap during all outdoor activities -Good Protection: Protect you when working in a workplace that require the protection of a hat -Simple Structure: Simple and elegant design. A good choice especially for everyday use and outdoor activities -Fine Shape: The Practical Cap Liner keeps the caps in good shape and supports it for a long time Package list: 1 x hard cap liner