This product is not a medical device nor is it regulated by the FDA.
 
This copper filter is plated with 99.9% pure copper and can be used as a copper filter for masks. 

4" x 3.5" inches
or
8" x 7"    inches

This item is shipped folded for best shipping price.
 
The material weighs 100g per square meter.

This Copper Plated Material is washable by hand in a ziplock bag with cool water and neutral ph soap shake vigorously. Take it out of bag and rinse with water and then pat dry with a clean dry towel. Washable up to 250 washes.

This copper material is easy to sew.
 
Keep in mind this is a metal plated material.  It can tarnish as any real copper material will. Hand creams are known to cause tarnish spots.