The next generation of our 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 fit