Burn more Calories with every step! New, never worn, without the box, adorable Earth "Proper" versatile, slip-on flats with Kalso negative heel technology. Earth footwear can give you all the calorie-burning effects of aninclined treadmill without having to go to the gym. The Kalso Negative Heel Technology positions yourtoes 3.7° higher than your heels - helping to tone, firm, and strengthen your body . Premium leather uppers accented by an adorable bow in the front. Pleated stretch perimeter band for easy on and off convenience and comfort. Color is black. Womens US size 9. These usually retail for over $100. Shipping in the U.S. is $5.00.