Features Ultra Soft fabric makes your mask more comfortable. NO MORE high pitched sound from air leaks during the night. Helps control air leaks, especially from changing positions during the night Give yourself a barrier between facial oils and your mask to prevent breakdown of the mask silicone. Let your pores breathe. Relieve your irritated skin. You no longer have to over-turn your headgear. your mask will not slide around during the night. These liners fit most full-size mask faces. Specification: Color:Blue Size:One size Package Included: 1Pcs * CPAP Mask Liners Notes: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you