You can feel the barrier it puts on your skin and really helps me feel better. It uses a physical switch you move with your thumb when you put it on. This is such a great buy, I no longer have to dig through the spice jars in the cabinet when cooking, it is easy to put together. 5 and needed the 2 and my daughter is typically a 10T and needed the 11/12. I would be willing to do this a hundred more times with this method. First review from India🇮🇳They are awesome. *Updating from 5 stars to 4: When it got really hot this year, I wore these constantly and my sweat started to soak through into the sole. Then the last 3/4 of the book she is grieving and I mean heavy duty grief. I bought this one since they were showing delivery date much quicker than other but this one didnt arrive in time anyway. Much sturdier than I anticipated.