Nasal mask is standard. which most people use and suitable for those who start using the machine for the first time Its use may be slightly more uncomfortable than the pillow mask, but it can be used with high air pressure. The nasal type is more comfortable because there is less pressure on the face. But the problem is that there is a leak much easier, especially those who use high air pressure. And not suitable for people who easily irritate the nasal passages or allergy Because it will release air directly into our nostrils, it may be more irritating than the nose cover type.