This is a terrible product. It’s not adjustable by level so why would anyone buy it? No wonder it’s on sale. Unfortunately for me I didn’t read all their terms and conditions (however on purchasing I do not recall it saying that it couldn’t be adjusted). The product was not suitable and they sent me a very curt email back saying no refund wouldn’t be given. I would have appreciated them providing an alternative solution such as a credit note or alternative product; but that wasn’t even an option based on the email they sent me. Not an ideal position to be in when dealing with a significant injury… My advice. Don’t order this product or from this company. Wish I had read the other reviews on them before I purchased.