There are three types of CPAP masks. They vary in design but also how the mask delivers air pressure to you.
Pillow masks – These are the sleekest masks, and are designed to be minimalistic. They have pillows that sit just inside the nostrils to deliver air into the airways.
Nasal masks – These sit over the nose instead of sitting inside the nostrils. It is therefore slightly more secure than the pillows masks and will not irritate the nostrils for those with sensitivities.
Full Face masks – These sit over your nose and mouth and are a good option for those with sinus issues or have suffered from a broken nose. They are also good for those who breathe through their mouth.