- Size: 39 • High-density memory foam insoles that mold to the shape of the foot, providing optimal cushioning and reducing heel impact. • Breathable design that allows air circulation, keeping feet dry and comfortable all day long. • Super lightweight and washable, ideal as replacement insoles to enhance the comfort of any footwear. • Suitable for a wide variety of footwear, including hiking, casual, work, and dress shoes. • Perfect for people who spend a lot of time on their feet, such as runners, travelers, hikers, office workers, and athletes.