For combined quality and comfort, get the EarMates Soft Foam Cannula Ear Protectors from Carex. These ear protectors are meant to go over the tubes of your oxygen tubes, specifically the part that goes around your ear. They measure three inches by three-eights of an inch. Keep them as it or trim them to better fit. The soft foam material they are made out of is extremely comfortable and will prevent chafing and soreness while you are undergoing oxygen therapy. You will be able to wear your cannula for long periods of time without feeling uncomfortable. They are designed to fit on any standard cannula for your convenience. Use them on your cannula or put them on the strings of a surgical mask while at a hospital or other location where you need a mask. Breathe easier with the EarMates Soft Foam Cannula Ear Protectors from Carex.