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Contact Suppliermaterial: non woven pp.size: 17.5x9.3cm, 17.5x9.5cm, as customers' requirements.color: white, green, blue, pink, yellow, grey and so on. Other colors are also available. style: elastic earloop or with ties on.layer: usually 3ply, 2ply and 4ply are also available for different requirements. nose bar: single aluminum strip or double alminium strip.economic, light, non-irritating, comfortable . prevent contamination from bacteria, dust, or coughing