Reduce noise and airflow irritation with these replacement CPAP mask diffusers. Mask diffusers are designed to soften exhaled air and create a quieter, more restful sleep environment. Ideal for light sleepers and bed partners, these small yet effective accessories minimize draft and sound without compromising sleep therapy performance. Upgrade your comfort with genuine Fisher & Paykel CPAP mask diffusers for the F&P Eson, Eson 2, Brevida and Zest Q.