New and improved height increasing insoles with air lifts. Fits all shoe sizes. Increase your height to feel better about yourself and give yourself an edge on the competition. Used by all walks of life. Men, women, businessmen, actors, politicians, athletes, etc. Undercover Fox are easily removable and will work in virtually any shoe you may have. *Please make sure your shoes is "High Profile" such as a boot style or half size larger than normal for best fit.*