An exemplary ankle brace includes an inner sleeve, an outer sleeve, a medial guide, a lateral guide, a top guide, and a bottom guide. The brace also includes a medial strap and a lateral strap positioned around the user's ankle between the inner sleeve and the outer sleeve. The medial strap and the lateral strap are configured to tighten the inner sleeve. The brace also includes a collar strap positioned around a tibia and a fibula of the user between the inner sleeve and the outer sleeve. The collar strap is configured to tighten the inner sleeve such that the ankle brace maintains a predetermined height on the user's ankle. The straps may be stiffened in a region of interest along a direction of interest. The brace also includes a pocket adapted to receive a removable arch support. The ankle brace may be configured to generate an electric charge in response to an applied mechanical load.
