Made of PE material, hard to fade and break, durable and reliable, which can be applied for long time use. workmanship, the smooth surface will not hurt your hair or head. Widely used in factories, construction sites, construction, welding, aerial work, and so on. Features -Material: PE. -Size: About 21.00X17.50X9.50cm/8.25X6.88X3.73in. - Lightweight baseball hat bump insert is comfortable and fashionable for head protection. - The bump insert fits inside most baseball caps for outdoor workers in low-risk environments. - Our bump have reinforcement inside, which are stronger and provide better protection. - It is excellent for the working environment that doesn't require formal safety . - It is proper for indoor or outdoor workers in areas that have low head , at home or some workplace. - Reducing pressure on your head and neck while working on a workplace that doesn’t require full hard hat protection. - Suitable for automobile assembly, maintenance, mechanical processing, industrial manufacturing, and many more. Package list: 2 x bump hat insert