The next generation of best-selling Skullerz 8945 Insert, the 8945F(x) Insert with extra venting delivers enhanced breathability and up to 35% more crown impact protection. This lightweight and 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. With flexible sides and convenient trim-to-fit customization, this bump cap insert easily fits a variety of hats/caps and head shapes. The shell is made of lightweight, durable polyethylene with a ribbed top for stronger crown impact protection. All-over venting maximizes airflow for cool comfort, while an interior foam pad reduces impact without absorbing odors for fresh all-day wear. • This next generation bump cap improves upon the design of best-selling Skullerz 8945 Insert for enhanced breathability and up to 35% more crown impact protection. • Lightweight head protection guards against bumps, scrapes, bruises and other minor head injuries. • Ribbed top improves top-of-head protection by up to 35%. • All-over venting enhances airflow to keep wearers cool. • Impact-resistant insert made of durable polyethylene will not break or crack. The next generation of best-selling Skullerz 8945 Insert, the 8945F(x) Universal Bump Cap Insert with Extra Venting delivers enhanced breathability and up to 35% more crown impact protection. This lightweight and 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. With flexible sides and convenient trim-to-fit customization, this bump cap insert easily fits a variety of hats/caps and head shapes. The shell is made of lightweight, durable polyethylene with a ribbed top for stronger crown impact protection. All-over venting maximizes airflow for cool comfort, while an interior foam pad reduces impact without absorbing odors for fresh all-day wear. Color(s): Charcoal Gray; Color Family: Gray; Material(s): Polyethylene; Insert Thickness: 0.06".