ltrasonic Welding Technology It is produced with the latest technology fully automatic machines in Aegean mask quality. Nose Clip It takes the shape of the nose easily. It does not cause any problems even with multiple uses. It is aesthetically hidden compartment. Since it is in the hidden compartment, it does not create additional risk in terms of occupational safety. Filter Material It has ultra thin and light fiber structure. It has high filtration efficiency. Provides low breathing / exhalation resistance. Headband It does not cause allergies. It does not contain latex. It is a circular shape. It does not lose its elasticity even in multiple uses. It is resistant to breaking and abrasion. The headband is colored according to the protection class to facilitate use and control.