CPAPology Black Knight Glo CPAP MatAll the benefits of the original Black Knight with an extra feature! The Black Knight GLO can keep your CPAP machine in place with this cost effective, non slip silicone mat. A fantastic accessory that addresses common CPAP issues like: water spills, overheating, vibration and nightstand scratches. Using the GLO light, night time tasks like humidifier refills, mask adjustments and changing CPAP machine settings become easier with the push of a button.