MAXIMUM LITE Disposable Earplugs, Foam, Green, Uncorded ORS NASCO Gas lenses provide a more Gas lenses provide a more efficient stream of shielding gas to the welding process The gas lens virtually eliminates turbulence in the gas shielding stream as it emerges from the nozzle Two piece construction consistent support without bottoming out Finished brushed tricot liner wicks away moisture and keeps out dirt and debris Secured with four brass grommets Low pressure polyurethane foam expands gently for comfortable long term wear Contoured T shape for easy insertion and wear Smooth soil resistant closed cell foam skin prevents dirt build up