Failed to load media. This is a great addition to my mask. It has good buffer space to help me breathe between the mask. It's soft and comfortable on my face and you can thread any mask straps through the holes. But after a while they kinda slip out of the holes holding the ends, but that's easy to fix. The mask arm is small enough to also fit into children's masks. It's a bit small for me, but it's just as comfortable and does the job, so I'd rather wear it than not. You can't even tell what's under your mask. It is also made from an easily washable material.