Very comfortable
My daughter has used supplemental oxygen on and off for entire her life (and constantly 4 years now). Her fighting is over the tubes in her nose was a daily battle until we found this bi-flow mask. It is so much more comfortable for her and with 4L of continuous flow oxygen remains quiet where a normal cannula was constantly whistling. She has been using these masks for a year now and we will not go back.
Rating: 5 stars