Athletic series. Helps protect feet, knees & lower back from shock. For sports, courts, and workouts. Side-to-side stability. Reduces muscle fatigue & stress on lower body joints. Designed for multiple sports & athletic activities. ActivPerform Arch Shell provides side-to-side stability for stopping and cutting. Responsive-Wave Cushioning in heel reduces stress. Multi-layer wave designs adapt to give you cushioning and energy rebound as you move through your stride. Provides you with comfort and support so you can move more. Designed for: Running shoes; court shoes; cross-trainers. Trim to fit. See instructions inside. Feel the comfort.