Bump Cap, Low-profile baseball style Bum Cap with inner HDPE liner. Inner High-Density Polyethylene (HDPE) liner with foam cushioning offers all round protection. Size adjustment with elastic strap and clamp action buckle ensures a secure fit. Holes in the liner plus mesh panels in the cap provide ventilation for coolness and comfort. Terry cloth sweatband adds comfort and absorption for the wearer. Non-ANSI. Protective liner is removable and washable, Ideal in areas where hard hats are not required.