3 layer surgical mask: 100% Original Non woven Fabric virgin material 1st Layer: 25 gsm Non- woven fabric 2nd Layer: 20 gsm Non- woven filter fabric free from dust partical 3rd Layer: 20 gsm woven fabric Filtration quality : Composite non woven fabric ( BFE> 93% ) Surgical Mask : All 4 corners of mask sealed with through ultrasound machine Surgical Mask size: 18 cm length, 9.5 cm width, 180mm*95mm ( unexpanded) Color : 1st layer Blue 25 gsm/ 2nd layer white 20 gsm / 3rd layer 20 gsm white Ear loop: 3mm elastic rubber material. Elastic both stitched and ultrasound sealed