Next generation support bed pillow for sleep apnea patients wearing CPAP masks. New improved design supports head and neck properly, all while accommodating bulky CPAP masks. improve comfort and support immediately.Two sides allow users to select memory foam or flip the pillow for fiber-fill. Comes with high-tech, custom fitted pillow cover. Now comes with 3/4 inch foam insert - leave in for a taller pillow or remove for the standard 4" tall size.