I ordered two of these masks. They seem to be of good quality but they are very expensive at $69.00 each. My wife didn't like the fit as it closely fits just around the nose and mouth leaving little space for mouth movement. So I wanted to return one of the unopened boxes for a refund. If you click on their web site you will see a hotlink for " customer service". But it doesn't load anything. You can't call them. After two emails and robo email responses It took a few weeks before they finally responded by email with mail Product back information. I'm waiting to see how long it takes for a credit card refund on the mask.
Ordered an N95 mask with filters for around $95.00. Never received it! Raised a ticket on the website - never got a reply! Trying to find a phone number to contact... cannot find it. Looks like a scam to me! KEEP AWAY!
Answer: Difficult. Period. Non existent phone. At least I could not find one. Communication via email or online. One way.