EHOB Inc WAFFLE Seat Cushion Standard 19" x 19" x 2", LatexFree manufacturer_Metrex Research LLC a reputable brand in Personal a reputable brand in Personal Care Features: This dishwasher safe humidifier chamber is constructed of strong Lexan (polycarbonate resin thermoplastic) and has a stainless steel heat transfer plate The chamber is easy to remove and replace and it includes built in overfill protection which prevents humidifier water from damaging the CPAP Heated humidification chamber EHOB Waffle Seat Cushion is used for comfort and treating and preventing pressure ulcers and the air venting holes allow heat and moisture to easily dissipate for a higher level of comfort