Please be kindly noted,the listed product is produced and distributed abroad and subject to the laws of its country of origin.Item Introduction:Material:Non-woven Fabric, Solvent Spray, Thermal Insulation CottonWeight:6g / MaskColor: White/Black/Blue/Pink/Yellow/Gray/KhakiSize :10.5×14.5cmQuantity: 5pc/20pcs/50pcs/100pcs/200PCSItem Details:* Preserves heat and is waterproof* Soft texture and comfortable wearAbout masks:mask can isolate smaller particles, and fit tighter to the face, it is not easy to leak air from the periphery, and the filtration efficiency of particulate matter can reach 95% under standard conditions.The mask is not a disposable mask. In this special case (resource shortage), it can be reused. But there are conditions:1. When receives contamination such as saliva, blood, tears and other body fluids, it must be replaced2. The user obviously feels that the breathing resistance is greater than before and must be replaced