The Fisher Paykel Simplus incorporates three key components, the RollFit Seal, ErgoForm Headgear, and Easy Frame. The Rollfit Seal rolls back and forth on the bridge of the nose to automatically adjust and reduce pressure on the bridge of the nose. The ErgoForm Headgear is breathable and self-locates high on the rear of the head and has an adjustable crown strap. The Easy Frame is low profile so it ensures a clear line of sight. In combination these components provide optimal comfort, seal, and ease of use. Available in three sizes small, medium, and large.