Cleaning and Repairing my Old AO Safety Respirator

CISONE Knit Elastic 3/4 Inch Wide Black Heavy Stretch High Elasticity Knit Elastic Band 10 Yards (Amazon Affiliate)
US: https://amzlink.to/az0xgRGDZMNG3
CA: https://amzlink.to/az0IylDMqTm48