The Eson™ 2 seals beautifully without needing to be tight. It has a washable diffuser over the exit valve so it doesn’t blow air all over the person lying next to you. It is whisper quiet and the Eson™ 2 has a lighter frame than the original Eson. The headgear is slimmer and is also stretchy making it easy to pull on and off like a hat. The cushion chassis is also smaller and the new design is colour coded so it’s easier to put together.