Mask material and adjustment length

Material of the fixing strap: The fixing strap of the mask is elastic. In addition to the exposed elastic elastic band, you can also use the elastic band wrapped with a knitted fabric to improve the comfort of the headband on the face.

Adjustable length of fixed strap: If the length of the headband can be adjusted, it will be beneficial to users with large faces and reduce the discomfort caused by over-tightening the headband.