Lightweight and warm, these Silk Interlock Pants are an ideal undergarment for warding off chills. These new-and-improved silk underwear pants will allow you to have fun in cold-weather conditions. They have two-way construction for more freedom of movement and are made with 100% pure silk to offer you the perfect combination of stretch and warmth. Machine washable. Imported. Sizes: S-3XL. Color: Natural.