Adidas by Stella McCartney Ultraboost Sandal If you're someone who likes a little style with your workout looks, go for these cool Adidas by Stella McCartney Ultraboost Sandals ($210). They've got such a cool little opening at the front, but are still supportive and made to move in. Image Source: adidas.com Adidas by Stella McCartney Ultraboost Sandals $210 from adidas.com Buy Now