The Ergodyne 6892 3 Layer FR Winter Hardhat Liner is a high-quality personal protective equipment designed to keep workers safe during cold weather conditions. Made by the trusted brand Ergodyne, this liner is designed to fit snugly under hard hats to provide extra warmth and protection. Its three layers of insulation ensure maximum heat retention, making it ideal for outdoor work in winter. This liner is a reliable and essential accessory for those working in cold and potentially hazardous environments.  Hook and loop straps included on the outside of liner to attach to your hardhat or helmet suspension.