Forehead Stability Bar Although some manufacturers are moving away from the forehead stabilizer piece on CPAP nasal and full-face masks, the Eson 2 maintains this feature, providing a forehead stability bar which helps maintain a more comfortable, secure cushion seal. Open View Mask Frame The Eson 2 Nasal Mask covers less surface than the original design, which was already considered slim. The frame's ease of motion and a secure fit are further advantages of the RollFit technology. Also, the full motion elbow moves in 360 degrees, potentially decreasing issues such as mask drag. The frame is designed to fit all 3 cushions: Small, Medium, and Large. If the cushion in the selected size is not ideal, remove the cushion and try one of the other sizes. Please Note: This package does not contain all 3 cushion sizes. In order to try different sizes, the cushions must be purchased separately. Easy-to-Fit Headgear Choose the ideal fit by adjusting one or more of the multiple adjustment points. The forehead support and mask frame attach to four headgear points around the face, while the slim, gray strap found at the crown of the head adjusts to prevent the headgear from sliding in different directions. After the mask is comfortably positioned, the fit can be maintained even when removing the mask. Two headgear clips found on either side of the base of the frame unhook from the small rods for an easy release. Eco-Friendly Noise Reduction A small, grey diffuser is found on the top of the mask elbow. The fibrous fabric is eco-friendly and serves to quiet the device as air releases from the mask. This part is replaceable and can be changed out to aid the longevity of the Eson 2 nasal mask.