We got this for our 5 yr old son to stop sucking his thumb. Then we had to turn around and buy another one because he would then just suck his other thumb. The velcro didn't stay on very good. I wish it was a little stronger hold, but we just used a safety pin to keep it on. Using this during the day, and then used long socks that were duck taped to my sons pajama shirt at night got him to stop sucking his thumb in a couple of weeks.