- Size: 40 These full foot insoles are made of thick and soft memory foam, greatly helping you when working or standing all day, offering long-lasting cushioning and support for your feet, helping to reduce pain in case of plantar fasciitis or heel spur. TIESTRA memory foam insoles slowly adapt to the shape of the foot, evenly distributing pressure when standing, walking, and running. - Made with high-quality memory foam - Memory Foam Technology for added comfort - Helps relieve sports injuries - Breathable surface to improve air circulation - Suitable for different types of shoes