- Size: 38 • High-density memory foam insoles that mold to the shape of the foot, providing optimal cushioning. • Breathable design that allows air circulation, keeping feet dry and comfortable all day long. • Ideal for a wide variety of footwear: from work shoes to hiking boots. • Perfect for those who spend a lot of time on their feet or want to reduce pressure on their feet. • Easy to wash with warm water and soap; it is recommended to replace them every month to maintain foot health.