New, Unused Instant purchase OK. Only one available. Since it's also listed on other sites, it's first-come, first-served. Ships on weekends. 【Box Type with Full Elastic】The box spring sheet for winter has a gusset of about 30cm. It fits mattresses with a thickness of 5-28cm perfectly. It doesn't slip even if you toss and turn repeatedly, so it's okay even if you have a bad sleeping posture. You don't need to spend time tidying it up every morning. 【Warm Contact Temperature Sensing & Heat Retention Function】The double box spring sheet fabric is 100% polyester flannel. The brushed surface feels good and is fluffy. It takes in warm air into the gaps of the ultra-fine fibers, and the air layer reflects the cold air from the outside. By taking in air between each of the fine fibers, it keeps the body temperature from escaping and keeps you warm. Compared to conventional microfiber, the fiber density is firm, so the occurrence of pilling and shedding is reduced with use. 【Moisturizing · Moisture Absorption · Antibacterial · Deodorizing Heat Generation Processing & Anti-Static Processing】The semi-double bed sheet uses a moisture-absorbing and heat-generating material that converts moisture from the body into heat, warming itself, and allowing you to feel the warmth. By kneading moisturizing ingredients into the fibers with special technology, the moisture content of the fabric is maintained, giving moisture to the skin. Fluffy moisturizing, about 5 times the moisture content compared to ordinary polyester fabric. It suppresses the growth of bacteria and suppresses the generation of unpleasant odors, so you can always use it comfortably. Also, it can be used with peace of mind in homes with small children. Box spring sheet warm for winter flannel microfiber single sale sheet futon cover bed sheet mattress cover bed cover anti-static full elastic with gusset about 30cm antibacterial and deodorant processing washable double・120X200cm