sopat reversible queen mattress pad pillow topper cover, quilted bed pad with deep pocket, down alternative fill, soft & comfort sopat sopat mattress pad creatively uses the textile technology available on both sides. one side uses a square box quilted surface, the other side uses a lamb wool fabric, and the middle is filled with more than 30oz of high-quality microfiber. no matter in any season, you can feel the comfortable sleeping experience that sopat brings to you.