This nasal mask seals beautifully without needing to be tighten with the "RollFit" feature at the bridge of the nose. It's snap on washable diffuser that covers the exit valve is an added feature to reduce air being blow on your bed partner as well quiets any exhaling noise. Eson 2 has a lighter frame, slimmer stretchy headgear and is colour coded for easy assembly. Complete Nasal Mask, Frame, Cushion and Headgear
