Description This item is a practical bump insert, which is made of hard ABS and PP foam. It has air holes on the for ventilation, great for full time outdoor workers in the low-risk workplace. It is compatible with baseball caps to provide head protection. Features - Color: Black. - Material: Hard ABS, PP foam. - Inner circumference 60cm; Outer circumference: 63.5cm; Height: 9cm. - It has air holes on the for ventilation. - Fits inside most "high profile" or "pro style" baseball caps. - for protecting head from lacerations, bumps and bruises in areas that do not require certified safety helmets. - Lightweight working is great for full time outdoor workers in the low-risk workplace. - Bump caps are not designed to protect against impact from falling or glancing objects.Package listing: 1 * Outdoor Safety 6-hole Bump Insert for Baseball Caps (Black)