PRICES MAY VARY. 【Futon Mattress Fabric】 The floor mattress cover is skin-friendly Brushed fabric, the mid-filling is anti-stress down velvet (100% polyester fiber) for long-lasting fluffy and rebound, offering a good support when you lie on the mattress. allowing you to enjoy more comfortable sleep. 【Ergonomic Design】 Adapt to the human body structure curve and correct the shape of the cervical spine.If your mattress is too hard, you can put this cushion on it to relieve back discomfort.The thi