The Big Blue Ear Defenders are suitable for use in medium duty industrial and outdoor environments. You can wear these with the Axminster APF 10 Evolution Powered Respirator. They feature a flexible strap to allow behind-the-head fitting of the headband. A generously padded headband and soft, wide foam ear cushions add up to a high comfort level even when worn for extended periods. The large foam filled ABS ear cups offer excellent attenuation. Conforms to EN 352-1.