Does Anyone Knows About The Weighted Vests For Kids With ADHD? And How It Works For Them?

Thank you, I have a kid with Attention Deficit Hyperactivity Disorder, I heard about the weighted vest, that may help to pay attention in school, but I’m not sure.
If you know something about this kind of therapy, I would appreciate your help.

Here’s A Video School Uses Weighted vests to Get Kids Focused