The Wisp Nasal CPAP mask by Philips Respironics is quickly becoming one of our best-selling nasal CPAP masks. This mask offers a light feel and the short tube easily clicks into the frame ensuring ease of use. The headgear of the Wisp fits on the lower part of the back of your head without any adjustment. Achieve the perfect nasal mask seal with all the cushion sizing options available: Small/Medium, Large and X-Large. Respironics also gives the option of a Petite cushion size however, it is only available as a separate add-on product. Choosing the correct cushion size is essential in achieving health sleep therapy. Overall, this is a very well-designed mask that provides a secure fit throughout the night without needing to over tighten or constantly adjust. Please note: this is the silicone frame version of the Wisp mask. Fabric frame version available also.