Fit & Design: Signature Superfeet shape provides a lightly structured, cushioned insole, and a profile made to feel like part of your shoes Flexes and adapts to your foot's natural motion for a smooth, easy ride Medium arch orthotic shape delivers flexible support while you run Made to fit well in running and walking footwear, including zero-drop running shoes Adaptive Comfort Technology(TM) helps your feet move the way they're supposed to, flexing with the foot for efficient heel-to-toe turnover and a smooth, easy ride Durable construction helps the insoles keep their shape, delivering reliable support and comfort for up to 12 months or 500 miles, whichever comes first Energizing heel cushion helps disperse impact with every heel strike, reducing excess vibration to fight fatigue Responsive forefoot zone blends cushioning and rebound to maximize energy transfer and help you get the most out of every step Aerolyte(TM) dual comfort layer helps your feet relax inside your shoes while providing optimal cushioning Unbelievable comfort and support Technology: Moisturewick(TM) technology helps reduce odors and keeps feet fresh Additional Details: Your purchase makes a difference; every year Superfeet donates 1% of sales and more than 1,000 volunteer hours to organizations working to shape a strong foundation for a healthy future