The Nike Calm Mule Na is a solid black slip-on sneaker with a low top shaft style, perfect for both activewear and casual occasions. Made with synthetic lining and a rubber outsole, this shoe offers comfort and durability. With a standard shoe width and suitable for walking, this athletic shoe is ideal for summer, fall, and spring seasons. The Nike Calm Mule Na is a stylish and functional option for both men and women, featuring the signature Nike brand and a sleek design.