Clarifications & Features: * A replacement face mask for Philips Respironics full face medication mask in standard or compact size. * Works with gel or silicone liners to check whether your current tire is low in size or not so look for an "RS" abbreviation printed under the hood area. * Comes with a full-face medicine mask with a compact or standard bezel. * The original silicone mask is available in two frame sizes: standard and compact, and the compact size fits all sizes of silicone and gel liners. * Standard and compact size fit all sizes of silicone and gel liners. * To check whether your current tire is small in size or not, see "RS" printed under the headgear area.
