Selling because the size is different from what I need. I opened it and discarded the outer bag, but it is unused. Excerpt from the following site: Color: Beige Material: Polyester Size: Wide King - 200*200cm Material Composition: Side: 100% Microfiber, Surface: 100% Natural Fiber, Back: Membrane (High-Quality Waterproof and Breathable Material Laminated) Pattern: Solid Product Dimensions: 2 meters length x 2 meters width ⛩【Gentle on People and the Environment, with a Comfortable Texture】The surface material of the Aooka waterproof sheet uses planned-planted eucalyptus trees as raw materials. It is a safe quality recognized worldwide, so it is safe for babies to put in their mouths. The fitted sheet is made with the world's most environmentally friendly manufacturing method, with 100% natural fiber on the surface, and 100% microfiber on the sides, which not only has a silky luster but also a silky smoothness. It excels in heat retention and moisture absorption, as well as being anti-static, anti-odor, antibacterial, and anti-mite. Regardless of the season, it's cool in the summer and warm in the winter. ⛩【100% Waterproof】The back of the Aooka fitted sheet waterproof is made of membrane (high-quality waterproof and breathable material laminated), coated with polyurethane to enhance waterproofness. It is completely waterproof even on the sides, preventing water leakage. The waterproof mattress cover is wrinkle-resistant, has 360° elasticity, and can accommodate thicknesses up to 30cm, making it easy to put on and take off! It is perfect for nursing care and bedwetting, as well as preventing water penetration and stains on futons and mattresses. The nursing care waterproof sheet is very useful when sleeping with children or pets, allowing you to sleep soundly until morning without worrying about your sleeping position! ⛩【Product Information】The natural waterproof fitted sheet is patented. The surface has a gentle texture, and the back has a solid waterproof effect. Material: Surface: 100% Natural Fiber Side: 100% Microfiber Back: Membrane (High-Quality Waterproof and Breathable Material Laminated) This is a high-quality product. Specifications: With elastic all around, it fits mattresses up to 30cm thick. Size: Wide King - 200X200*30CM. Product weight: Approximately 0.8kg. ⛩【Safety and Security】Aooka waterproof sheets offer a two-year quality guarantee. Planned in Japan and made in China, it is produced in an ISO9001 certified factory. It is an Oeko-Tex Standard 100 certified product. The fitted sheet can be machine washed, but please also check the precautions for your washing machine.