I have two severly broken ankles. I wear these braces sometimes in my shoes. They offer typical ankle support for these type of braces. They are a little tight on my ankles(size L) although my ankles are now huge. I am glad 661 make these and similar products for us motoheads. I wish they made an XL because the plastic cup inside will dig into the skin when to tight. For the price these are great and will work in your boots.