... ,size big or small Non-woven products for the three masks masks, high quality spunbond non-woven material for ... bottom, fabric, middle layer of high-quality meltblown nonwovens, extruded through ultrasound can effectively filter pollen, dust, and other ... 145MM * 95MM (90MM) of three. A mask length can be changed according to customer requirements. The other three-dimensional masks are available.