Shock Doctor Active Ultra Insoles - Men: 9.5-10.5 / Women: 10.5-11.5 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.Designed for all athletes and all sportsFull-foot alignment, max shock absorption, stability and supportIncreased motion control to reduce joint fatigue and painCan help relieve plantar fasciitis pain5mm thinINSTRUCTIONS FOR BEST FIT: Remove your current insole and insert the Shock Doctor Performance Insoles. If trimming is needed, use the insoles you just removed as a guide and trim your Performance Insole to match. A break-in period of up to 7 days may be required for the insole to fully adapt to your specific foot shape.WASHING INSTRUCTIONS: Hand wash in cool water with a mild detergent and then air dry100% PERFORMANCE GUARANTEE: If, for any reason, Shock Doctor Performance Insoles don't 100% meet your expectations, return them within 60 days for a credit or refund. Only valid with proof of purchase. Not valid if misused, abused or improperly cleaned.