YES I WARE MY C=PAP MACHINE MASK EVER NIGHT.. TOOK A WHILE TO GET USED TO IT,, THANK GOD FOR MARY ANN, SHE WAS ON THE MACHINE FOR AWHILE AND KEPT TRYING DIFFERANT MASK'S, AND WE FINALY FOUND THE PERFECT ONE FOR US,,,, HARD TO DO WHEN TRAVELING BUT WE HAVE USED THE MACHINE ON CRUISES AND HOTELS,, MARY ANN EVEN HAS A BATTERY ONE FOR LONG AIR FLIGHTS.. - IF YOU SNORE OR TAKE NAP'S GET TESTED ASAP... SKIP