Sole Material: Special Resin Outer Material: Synthetic Fiber Water Resistance Level: Non-Waterproof About this product: The upper is made of flexible synthetic fiber, effectively isolating cold air from the floor, making it warm and perfect for autumn and winter "room shoes." The insole is made of high-density memory sponge, providing comfort and warmth while reducing muscle fatigue, making it a model that won't tire you out even after wearing it for a long time. The outsole does not use rubber material, but a special material that is durable yet gentle on floors. Usage scenarios: This is a great item for use as slippers at home or as room shoes in the office. Features: Softness, lightness, and comfort.