Fisher & Paykel Eson Elbow Cover and Diffuser

Fisher & Paykel Eson Elbow Cover and Diffuser includes the diffuser filters which fit snugly between the diffuser Cover and the elbow on all Eson CPAP Masks. This diffuser is useful for lowering the sound level, and does so for any Eson Series Mask by approximately 8 dBA. When in use, the cover and filter will reduce the sound level of exhaled air from the mask. It is recommended to replace this filter after every 2-3 months of usage.