Soft and comfortable. The upper is made of flannel material, which is soft against the skin, delicate in texture, thickened and warm, and warms the feet throughout the winter. High-quality sole: The sole is made of TPR material, which will not break the glue and break the bottom. Ideal for both indoor and outdoor use for pain relief: Our cotton mops provide long-lasting marshmallow-like comfort and warmth on your tired toes and heels, reducing muscle fatigue and relieving stress after a hard day's work pain and stress. FLEXIBLE AND COMFORTABLE: Uniquely constructed and designed, these slippers fit perfectly every time and can be easily put on and taken off in a second, perfect for wearing at home or while walking the dog.