PREMIUM FOAM EARPLUGHoward Laser Lite Refill for use with LS-500 dispenser. SNR 35, Self adjusting polyurethane foam expands to fit virtually every wearer, Contoured T-shape for easy insertion and wear, Vibrant colours make protection visible, Smooth, soil resistant closed cell-foam skin prevents dirt build up, Conforms to EN352-2, EN352:2020 SNR 35