Signature Superfeet shape in a lightly structured, cushioning insole made to feel like part of your shoes. Flexes and adapts to your foot's natural motion for a smooth, easy ride. Unbelievable comfort and support without changing how your running shoes were built to perform. Made to fit well in running shoes and athletic footwear, including zero drop running shoes. Signature Superfeet shape in a lightly structured, cushioning insole made to feel like part of your shoes. Flexes and adapts to your foot's natural motion for a smooth, easy ride. Unbelievable comfort and support without changing how your running shoes were built to perform. Made to fit well in running shoes and athletic footwear, including zero drop running shoes. Signature Superfeet shape in a lightly structured, cushioning insole made to feel like part of your shoes. Flexes and adapts to your foot's natural motion for a smooth, easy ride. Unbelievable comfort and support without changing how your running shoes were built to perform. Made to fit well in running shoes and athletic footwear, including zero drop running shoes.