Doesn't accomplish its purpose
Masks make it difficult to breathe and to talk. I ordered this one because it will attach to a mask and not fall out when I remove the mask. That I like. It's fairly effective at keeping fog off my glasses, too. However, it's so flexible that it doesn't really accomplish the purpose of allowing me to breathe more freely. It adds weight and is cold to the touch. It's not increasing my mask wearing when I am physically active or need to make a presentation.
Rating: 3 stars