□ M-valve □ B-valve □ Angel The Mai-mask follow the New Ergonomic design of the face . The Mai-mask provides an excellent seal without tight headgear. The cushion of Mai-mask can prevent the face pressure sores efficient and offer the comfort cushion for face. Unique Seesaw valve can minimizes noise and enable efficent C02 washout Continuous Positive Airway Pressure Mask The Mai-mask's D-density ™ cushion technology can offer Air/ Liquid/Gel cushion accommodates movement during sleep and provides an effective solution for jaw drop. The Bi-film ™ and Bi-crook ™ Seal technique is lightweight, soft, and very comfortable. The Mai-mask's is easy to clean, odorless, and totally airtight. The Mai-mask's unique 3Fit™ combine with rotary pad that will suit each individual user. 3Fit™ A choice of 3 positions at your fingertips - providing a comfortable,