Vitrex Corded Earplugs are designed to provide maximum comfort and low pressure inside the ear. They are made of soft polyurethane foam. The smooth, dirt-resistant surface provides proper hygiene, durability and comfort, while the polymer foam compresses then expands for a perfect, comfortable fit. Reduction of noise by 33 dB makes them suitable for use with power tools, woodworking, vacuuming, mowing, drilling and all noisy environments. Corded to prevent accidental loss or dropping when in use. Tested to EN 352-2:2002.