* Product size: - size M: length: 155mm, width: 105 mm, elastic band length: 175mm, nose clip length: 95mm - size L: length: 155mm, width: 110mm, elastic band length: 175mm, nose clip: 100mm *Component: 5 layers with 1 layer of non-woven fabric weight 50 gms, 1 layer of non-woven fabric with weight 30 gms, 1 cotton layer weight 50gms and 2 layers of melt blown weight 25 gms * 1 respiratory valve