Scan Standard Ear Defenders are general purpose - ideal for wear during a variety of applications. The PVC ear cushions are soft and wide for enhanced user comfort, along with the flexible headband, foam padding and adjustable cup height for a great fit. The cups are slimline for ease of portability but still effectively reduce noise levels without preventing the user from hearing normal conversation. These Scan Standard Ear Defenders have an SNR of 26dB and conform to EN352-1:1993.