Mask seal washer and color

Put a gasket on the nose: some can improve the seal at the bridge of the nose, and some can help absorb sweat.

With a face seal: Adding a seal to the inside of the mask may increase the seal, or facilitate wiping and cleaning, which is conducive to maintaining the hygiene of the mask and prolonging the use time.

Color: White is common, gray is more resistant to stains, and other colors are available to meet different preferences.