@kathyjjb @sueinmn
Hi all -- We had such bad ozone numbers here in NYC last summer that I started looking into the mask issue. There are a couple brands of KN95 masks on Amazon with an activated carbon layer added, which is said to be effective against ozone. I bought "5-PLY BlueEagle Disposable Face Masks" ... Couldn't tell if rheyt work? And there's no standardization or objective evaluation, so ... who knows? I can't understand why there's so little attention to this when it's well known that ozone is a real problem. These masks are not super expensive so I thought worth a try.