DescriptionMade of PE material, hard to fade and break, durable and reliable, which can be applied for long time use. Exquisite workmanship, the smooth surface will not hurt your hair or head. Widely used in factories, construction sites, construction, electric 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 helmets have reinforcement inside, which are stronger and provide better protection. - It is excellent for the working environment that doesn't require formal safety helmet. - It is proper for indoor or outdoor workers in areas that have low head clearance, at home or some workplace. - Reducing pressure on your head and neck muscles while working on a workplace that doesnt require full hard hat protection. - Suitable for automobile assembly, maintenance, mechanical processing, industrial manufacturing, and many more.