Zyppah vs PureSleep
These two MADs (mandibular advancement devices) made by Zyppah and PureSleep both work very well. You can consider the Zyppah two devices in one though: a MAD and a TRD (tongue retaining device). My wife and I slept comfortably with both devices. The user-friendly features of the Zyppah made it our favorite of the two…

