1.FDA,CE,ISO certificates 2.Material: non woven,unique surface water resistance and soft lining. 3.Common size:17.5x9.5cm. 4.Adjustable nose piece for easy use. 5.Style:tie-on or ear-loop. 6.Glass fiber free and latex free. 7.Breathing Resistance (Delta P)99% ,Particle Filtration Efficiency(PFE%)>99%. 11.Resistance to penetration by synthetic blood-160mmHg
