A nasal CPAP treatment apparatus is disclosed with a flow generator coupled to a nasal mask. The mask has a nasal cushion forming a nose-receiving cavity. The cushion has a triangularly-shaped frame of resilient material with a mask engaging portion connected by a side wall to a face engaging portion...http://www.google.ca/patents/US20030019495?utm_source=gb-gplus-sharePatent US20030019495 - Mask cushion and method of using same
