The upper is made of a highly flexible synthetic material, effectively insulating against cold from the floor, making these "room shoes" warm and perfect for autumn and winter. The insole is finished with high-density memory foam, providing comfort and warmth while reducing muscle fatigue, making them ideal for long wear without discomfort. The outsole does not use rubber but a special material that is durable yet gentle on floors. Usage scenarios: These are a great item for use as slippers at home or as room shoes in the office. Features: Softness, lightness, comfort Color: Black系 Product Number: SK_0011 #sana_SK