BAREFOOT STYLE AND COMFORT. The Nike Celso Girl Slides offer soft cushioning and easy style. Its synthetic nubuck strap is plush and smooth, while a foam footbed offers comfort. Benefits * Flip-flop style offers easy on and off. * Synthetic nubuck strap is durable and flexible. * EVA midsole cushions each step. * Outsole features Phylon foam for cushioning. * Swoosh design on the strap gives a sporty finish.