The Core CPAP Pillow was designed by CPAP users, for CPAP users, in response to common concerns such as pressure point soreness and mask leaks from pillow interference. This unique pillow has quilted side panels to create a distinct edge, allowing the mask to comfortably hang over the side of the pillow. This prevents the CPAP mask from being forced into the side of the face. The CPAP pillow works well with all types of nasal, full face, or nasal pillows style masks. A fitted pillowcase is included.