1Soft and skin-friendly, high elasticity, care for your foot. 2Shock absorption and pressure relief, relieves pressure on the soles of the feet. 3U-shaped heel designs, fit and wrap heel, distribute force on the feet, reducing stress and fatigue. 4Made of silicone material, strong adsorption, anti-aging, cold and high temperature resistant. 5Hole designs, breathable, assure comfortable walking, easy to clean.