This one month supply includes 4 premium reusable liners. Helps reduce or eliminate air leaks and virtually ends annoying noises of escaping air from your mask. Innovative:Micro Pillow™ Fabric Technology - The Micro Pillows™ act as a series of baffles to significantly reduce air leaks.Soft and cushioned.Easy to handle fabric resists curling and forms nicely around the mask. Healthy:Anti-Bacterial: Healthy, clean and safe.Reduces nose bridge sores.Keeps mask cleaner and reduces mask cleaning time. User Friendly:Secure the liner to your CPAP mask using repositionable Quick Stick™ tabs.Adjust the positioning of the liner by simply removing and reapplying the Quick Stick™ tabs.Remove the liner for mask washing and re-attach for use. Comfortable:Moisture within the mask is wicked away by the liner.Unsightly and irritating facial pressure marks are greatly reduced or eliminated.