Philips Respironics Gel cushion for Amara Full Face Mask

This Blue Gel Full Face Cushion provides exceptional seal and comfort with a soft outer shell that conforms to the face while a thicker inner wall supports the mask and adds stability.SIZING: Four cushion sizes -- Petite, Small, Medium, Large -- are available to fit a wide range of faces. Any cushion size will fit on any Amara or Amara Gel mask frame; so if you find you want to try a different size you can simply purchase a new cushion rather than having to buy a whole new mask. Cushion size is indicated by a single letter -- P, S, M or L -- printed on the base of the cushion.Do you need help choosing your correct size?