A CPAP nasal mask is any mask system that covers just the nose to deliver air for the PAP treatment. Nasal masks are generally used with a chin strap to prevent the air from going in the nasal passage and directly out of the mouth, thus eliminating the benefit of the PAP treatment.

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Nasal masks come in many different shapes, sizes, and materials. Some use a silicone-type cushion to form a seal around the nose. Others use a thicker, heavier gel cushion that generally creates a better seal than other types but is usually bulkier and heavier than its silicone counterparts. Another type is the nasal prong or pillow style that goes inside the nostrils, similar to nasal cannulas used in oxygen therapy.

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Masks with a silicone-type cushion include the Mirage FX by ResMed, Respironics Wisp, and FlexiFit 407 by Fisher & Paykel. Gel cushion masks include the Softgel by ResMed and the Comfortgel by Respironics.