840 denier nylon shell with a soft neoprene liner for comfort and feel Non stretch straps that lock in the heel imitating the effects of a tape job Includes two spring steel stays on both sides for additional support against sprains and heel release for comfort and fit For the right or the left Size chart based on shoe size this chart is only a guide. Size to Order Men's Women's X Small 6 7 7 8 Small 8 9 9 10 Medium 10 11 11 12 Large 12 13 13 14 X Large 14 and over 15 and over