I was skeptical at first of taping my mouth while I sleep, but now I can't sleep without it. I wear a bottom teeth night guard and found my mouth was always open while sleeping. VIO2 helps me sleep comfortably with my mouth closed all night, without feeling restricted. I can still breathe from my mouth if needed, even take sips of water through a straw, sneeze and cough. I briefly tried using regular paper tape but it left such a sticky residue in the morning. VIO2 is easy to remove, comfortable to wear, and feels high quality. Only note is that the adhesive smells a little weird, but it's not bothersome.