The Nasal Pillow Mask is smallest and has minimal facial contact. Nasal Pillow masks deliver air directly to the nasal airway by a pair of small "pillows" which rest on the end of the nose. They are a great choice for claustrophobic CPAP users.
The Nasal Mask is a triangular cushion which fits around the nose only. The small size and ease of use makes it a good choice for new PAP users.
Full Face Mask
The Full Face Mask is the biggest mask and covers both the mouth and the nose. This mask is great for people who have experienced "mouth leak" or who have a history of breathing out of their mouth while sleeping.