Combining the performance and comfort of a nasal cushion with the minimalist simplicity of nasal pillows the Wisp CPAP/BiPAP Mask is a truly elegant solution for sleep therapy users. The Wisp's compact design and open style frame provide a sense of freedom and independence. Two frame options -- sleek silicone or soft fabric -- are available so you can choose the one that best suits you; and three cushion sizes are included in each pack so it's easy to find your best fit.