【Size】Fits perfectly on mattresses of 100cm x 200cm and 5-30cm thickness! Box type with anti-slip elastic all around. 【Material】Flannel (100% polyester) 【Smooth, skin-friendly feel】The box sheet is densely packed with microfiber, preventing warmth from escaping. 【Fluffy and warm】Soft and fluffy, the moist touch soothes and warms both body and mind. The natural feel is stress-free and comfortable to use. 【Moisture-absorbing and heat-generating, becomes warm】The box sheet generates heat through the adsorption heat produced when the moisture-absorbing and heat-generating microfiber absorbs moisture. It's an essential bedding cover for those who feel the cold easily to spend winter comfortably. 【High insulation, doesn't let warmth escape】The moisture-absorbing and heat-generating microfiber layer of the bed sheet traps heat and moisture between the fibers, creating air layers, which keeps the humidity on the sheet surface in an appropriate state, and the heat retention effect lasts for a long time. 【Static electricity suppression】To reduce the generation of crackling static electricity indoors during winter, the bed cover has been treated with [anti-static] processing. The moisture absorption of flannel also helps to reduce static electricity by trapping moisture between the fibers. 【Washable】The box sheet can be washed in your home washing machine, so you can always use it cleanly. It also dries quickly, which is convenient for washing in the cold season. ※ Light gray ※ Single ※ Compressed and packaged