CPAP CPAP therapy is effective in reducing sleep apnoea and less expensive than other treatments, however, some people find it extremely uncomfortable. Patients complain of feeling trapped, having chest discomfort, and skin or nose irritation, all caused by the mask. Much of the sales literature from companies that make CPAP systems focuses on the comfort of their masks. One way of helping patient comfort and compliance is to ensure that the mask fits the nose and face well and does not cause any discomfort. The material of manufacture of the mask is also important with hardness/softness, flexibility, durability, and hypo-allergenicity all considerations. Custom making the mask to fit the patient should ensure an improved level of comfort over the more generic masks which currently exist. The aim of this project is to 3D print the customised mask inserts in silicone that fit specifically to individual patients faces and within commercial companies’ generic masks.