MSK 3-Layer General Purpose Non-Medical Masks (Pack of 50 Pieces)

Comfortable face mask with test report from the National Textiles and Garment Quality Supervision Inspection Center confirms attests that these masks perform better than 97.5% masks. To use: 1. Blue colour face out, white colour face in. 2. The side that the loops are attached to is the white face in side. 3. The metal strip should be at the top on the face mask. 4. Pinch the metal strip tightl...