Fits the following Full Face mask styles:</br>Fisher & Paykel Flexifit 431 and 432 Medium</br>Fisher & Paykel Forma Medium</br>ZZZ-Probasics Full Face Medium</br>Hans Rudolph Full Face Medium</br></br>Product Description</br></br>RemZzzs is an accessory to your mask?? made from a special blend of naturally absorbent fibers that are designed to help absorb facial oil and moisture. Why is this so important? An increase in moisture?? along with dirt and oil build-up?? usually results in a loss of air pressure which can set off a