Goggle Retainer Ring Keeps Your Goggles Within Reach. The goggle retainer is designed for use where protective goggles must be worn with a safety cap style and full brim hard hat. Installs quickly and easily. No tools required. Dielectric retainer will retain the goggle on the safety cap when th goggle is not in use; hold the goggle securely when worn for eye protection. (Goggle and Cap not included.)