Nasal pillows have become a very popular nasal mask option for many CPAP and Bi-Level users in the recent past. Nasal pillows consist of a silicone puff that easily occludes and seals the outside of the nostril. They provide an unobtrusive line of vision and can sometimes feel less claustrophobic for users as compared to nasal or full face masks. The frame designs for nasal pillow are very minimal which can allow for multiple sleeping positions. Many stomach sleepers find nasal pillows work best for them.