Universal Bump Cap Insert with Extra Venting delivers enhanced breathability and up to 35 percent more crown impact protection. Lightweight, breathable, impact-resistant shell easily inserts into any baseball cap, hat or other headwear for protection against bumps, scrapes, bruises and other minor head injuries. Bump cap features flexible sides and convenient, trim-to-fit customization to fit a variety of hats/caps and head shapes. Shell is made of lightweight, durable polyethylene with a ribbed top for stronger protection. All-over venting maximizes airflow for cool comfort. Interior foam pad reduces impact without absorbing odors for fresh, all-day wear. Nonbulky bump cap is typically worn in spaces where impact head protection is needed, including working with low ceilings, beams, low pipes and other bump hazards. It is ideal for mechanics, airline baggage handlers, factory workers and other industries that do not require safety hard hat protection.