Mueller Gel Ankle Brace The Mueller Gel Ankle Brace is an extremely light, adjustable brace that helps prevent inversion sprains without restricting movement. Air filled upper chamber conforms to calf, gel filled lower chamber molds to ankle for custom fit. Removable gel pads can be placed in freezer for cold therapy. Semi-rigid shells of high impact resistant material contoured for optimal comfort and support. Sold individually. Fits men's shoe size 7.5-18, women's shoe size 6-16.5.