1)
MASK SUPPLIES:
Use hot glue to glue a rubber seal slightly above the edge of the mask. Please check the glue rim on the gasket to make sure there are no air holes and fill as necessary.
2)
Use a heat gun or hairdryer to heat the edges of the mask and mold it to fit your face shape properly. When you blow out while wearing the mask, no air should be felt coming out of the sides of the mask.
3)
Attached the elastic at a desired length.
