CPAP Beard Sealant is a "non-greasy" and clean to use product that will not harm your mask. This natural ingredient sealant will easily wash out with warm water over the sink or in the shower. Helps reduce friction between your mask and facial hair, stopping thinning areas or bald spots in your beard or mustache! This sealant will improve your comfort and health while maintaining the quality of your beard or mustache. The large .05 oz size stick is an approximately 6 month supply for the average user. Just stoke a small amount of your CPAP Beard Sealant onto your beard or mustache where your mask comes into contact with your face, comb or brush down, position your mask and enjoy a comfortable nights sleep.