Pyramex Safety - Bump Cap - Ridgeline Bump Cap Red - Stylish Ridgeline bump caps are also available for applications where hard hats are not required, but some protection from minor bumps and scalp lacerations are needed. Ridgeline bump caps are made of polyethylene material and are not designed to meet the safety standards for industrial head protection. Replaceable sweat band padded fabric and polyurethane foam for all day wear. Ventilation holes keeps your head cool and dry for all day wear. Pyramex Bump Cap HP40020 - Ridgeline - 4-Point Glide Lock Suspension - Red