I ordered a chin strap being newly diagnosed with sleep apnea. It turned out to be the wrong size not worn just tried on. I spent $1700 on a Resmed Cpap set up and they would not refund for the chin strap. What does that say about service to their customers. Terrible customer service. Unless you know exactly what you want and size don't order from them you will just be left out of pocket. I wasn't even asking for a refund and offered for them to swap it for filters. They are an absolutely unnacommadating company dont't order from them.