Performing at your best means going the extra mile, training that extra 5 minutes and pushing beyond your limits. In doing so, you put your most important piece of equipment - your feet - through a tremendous amount of stress. In order for you to perform your best, your feet, ankles and knees need to be free from pain and joint fatigue. The Shock Doctor Active Ultra Insole is specifically engineered for higher-impact performance and full-foot alignment for the most long-lasting support and stability. The Shock Doctor Active Ultra is ideal for all athletes who want to compete without compromise.