PSD-CURATIVE has offered masks under the PSD MASK KF94 trademark, which distinguishes them from other masks.
1. Filter with four layers
2. ASTM2100 LV.2, which is a medical standard.
3. Results certified by Nelson Lab USA for filtration.
4. Filter fabric has distinctive features, not irritating to the face.
5. The elastic ear strap is not painful to the ear.
6. Registration No. of the TH FDA.: 65-1-3-2-0000468