CPAP Philips DreamWear Full Face Mask, Size M I am selling a mask used for treating sleep apnea. There are no major scratches or stains, but please check the photos. [Product Features] * Mask cushion that contacts the skin in a small area, fitting over the nostrils * Original design that allows air to pass through the frame * Frame design that connects at the top of the head, making it less likely to get in the way when you turn over in bed