1, Material: Non woven PP 2, Size: 17.5x9.3cm, 17.5x9.5cm, as customers' requirements. 3, Color: White, green, blue, pink, yellow, grey and so on. Other colors are also available. 4, Style: Elastic earloop or with ties on. 5, Layer: Usually 3ply, 2ply and 4ply are also available for different requirements. 6, Nose bar: Single aluminum strip or double alminium strip 7, Economic, light, Non-irritating, Comfortable 8. Prevent contamination from bacteria, dust, or coughing