Foam Mask - Assessment of Bioburden in a New Mask Seal Material

"Current CPAP masks are mainly silicone elastomers, which though well understood and accepted, are often uncomfortable.~Test Units: The test unit is a foam seal component which directly replaces the patients existing silicone mask cushion, and is fitted to the patients existing mask frame.~Subjects will wear the test unit mask, instead of their current CPAP mask, each night whilst sleeping."