Mueller Gel Ankle Brace provides maximum support after a severe injury or just ankle support. This state-of-the-art brace provides maximum support for injured ankles. This extremely light, adjustable brace helps to assist the healing process after a severe injury through cold therapy. The upper chamber is air filled and conforms to the calf. The lower chamber is gel filled to mold to the ankle and functions as a support cushion and as a high performance cold therapy system. One-Size-Fits-Most (Fits shoe sizes from women's 6 - 16.5 to men's 7.5 -18)