I'm selling these because I bought them but didn't use them. Hakugen Earth Range Yutapon L size × Set of 2, with washable covers Ready to use immediately after heating in the microwave. A soft and comfortable gel-type foot warmer. The pleasant warmth thoroughly warms cold feet. The large L size (twice the size) warms a wide area inside the futon. Warmth lasts for about 7 hours. *This is an estimate when used inside a futon. *The duration may vary depending on room temperature and usage environment. Comes with a washable, fluffy, dedicated cover. Reusable. Also for dogs and cats. Useful in cold cages. ・Main Specifications Contents: L size, 1 piece × 2 sets Size when in use: 23 x 35 cm Ingredients: Water, gelling agent, coloring agent Cover material: Polyester