♪ Breathable and Comfortable The upper uses breathable mesh, providing excellent ventilation. ♪ Non-slip The outsole uses wear-resistant rubber with a bumpy, non-slip design. The sole has strong grip and is not slippery. ♪ Easy to put on and take off Easy to put on and take off with Velcro. Lightweight and flexible, with firm heel support. ☆ Although set at 25.0cm, the product page on the purchase source states S size, 24.5-25.0cm, and is for both men and women.