【Product Information】Size: Single - 100x200cm Material: Surface - 100% Polyester Filling - 100% Polyester Backing - Polyurethane (TPU waterproof material) Side Skirt - 100% Polyester Specifications: Features an all-around elastic band, suitable for mattresses/futons up to 30cm thick. 【Reliable Waterproofing】The TPU waterproof material on the back prevents moisture and stains from penetrating the futon or mattress, reducing concerns about bedwetting by children, accidents by pets, and soiling of bedding for the elderly or sick, keeping it clean and hygienic, and supporting a comfortable sleep. 【Gentle to the Touch】The surface is made of soft and comfortable peach fabric, and the washed finish adds natural wrinkles and softness, bringing out the texture of natural materials, and providing a smooth touch for year-round comfort. With reliable waterproof, antibacterial, and anti-mite functions, it can be used with peace of mind by babies, people with sensitive skin, and those with delicate skin. 【3-in-1】Combines a waterproof sheet, a fitted sheet, and a box sheet for ease! Filled with a moderate amount of fluffy filling, it provides a soft and comfortable sleeping experience. It's thicker than ordinary box sheets, and it's a pad-integrated box sheet that combines softness and resilience. 【All-Around Elastic Type】With a 360° elastic band, it can be easily attached just by covering it. It supports thicknesses up to 30cm, so it can be securely fixed to mattresses/futons, and it won't slip even if you toss and turn, allowing you to sleep soundly until morning. 【Machine Washable】Can be washed at home. When using a washing machine, please use a laundry net and wash on the hand wash cycle. It dries easily, making it easy to care for, and you can always keep your bedding, which touches your bare skin every day, clean and comfortable. Gray single sheet with waterproof function, 100x200cm - Brand: Kumori - Size: 100x200cm - Color: Dark Gray - Condition: New I am selling this because I mistakenly purchased the wrong size. I have opened it once to check the color and size, but it is new and unused. Please consider your purchase carefully if you are looking for perfection or are concerned about minor details. To reduce the price of the product, the shipping method may be changed between "Rakuraku Mercari Bin" and "Yuuyu Mercari Bin" depending on the situation. Thank you.