THIS REVOLUTIONARY EASY BREATHE MASK HAS COPPER INCORPORATED INTO EVERY SINGLE FIBER OF THE COPPER FILTER. This product is not a medical device nor is it regulated by the FDA. Material plated with 99.9% pure copper on front of face masks may vary in style depending upon what is in stock. Variations can be seen in the photos displayed Mask DescriptionThis copper mask, Essential 3.0,  features fabric covered or exposed layer of material that is plated with 99.9% pure copper. The copper material weighs 100g per square meter. The Essential 3.0 has one middle layer of non-woven, polypropylene. The mask's inner layer (the inside that lays against the face) is plated with 99.9% pure silver. The pure silver filter material weighs 100g per square meter. When properly sized, the face mask does not touch your mouth, it is the most comfortable face mask made in United States. Designed for airline pilots, airline passengers, submarine crews, office workers, receptionist, cashiers, service technicians and many other trades (warning to electricians, do not use around eletricity, the pure copper and silver conduct electricity) and those in confined work areas for long periods of time. The 3.0 mask's patent pending spring bronze nose piece is covered with a soft moisture-wicking material. The extended length nosepiece adds extra comfort and extends past the nose base and over top the cheek bone. If the green button is tightened to the proper tension, the nosepiece prevents exhaled air from leaking and fogging glasses or goggles. Each mask must be contoured to fit each individual's face and nose profile before use. No annoying earloops. Mask Dimensions  (This mask fits comfortably over other widely used masks.)The Teen Adult Sm/Med mask is approximately 6" tall x 8.5" wideThe Adult Lg/Xl mask is approximately 7" tall x 9" wide Keep in mind this has a metal plated material.  It can tarnish over time as any real copper or silver material will. IMPORTANT CARE AND WASHING INSTRUCTIONS: AFTER DAILY USE, SANITIZE face mask by spraying with 90% isopropyl alcohol and air dry. All exposed copper masks can be easily sanitized by spraying with 90% isopropyl alcohol. Once a month, they can be hand washed in a ZipLock (plastic resealable bag) in cold water and 2 tablespoons of Neutral PH Woolite Delicate soap, shake for 2 minutes. Then rinse by shaking in cold water in the ZipLock baggie until the soap residue is gone. The Essential 3.0 copper masks with colored protective covered material over the copper are machine washable with Neutral PH Woolite Delicate soap, set machine on cold water and gentle cycle, washing inside a small mesh garment bag. ONLY HANG DRY OR BLOW DRY ON LOW HEAT. Any other soaps damage the copper plated filter surface. ​Limitation of Liability. Doc Silver Medical Wear and it's proprietors will not be liable for any loss or damage arising from the use of this product, whether direct, indirect, special, incidental, or consequential use. Return PolicyDue to the nature of the product, we do not accept returns.  For questions or concerns please contact our Customer Service Department at 812.406.6099.