Antarctic velvet is a kind of natural fiber fabric, which is comfortable to wear and has better close-fitting effect, because it can absorb and store the body's heat, which can not only keep the body's temperature, but also effectively block the cold outside. Poly-fleece is a kind of cotton-based fabric, which is basically the same as pure cotton. It is high-content cotton, but the difference is that its surface has fluff made by advanced technology, which can improve its skin-friendly feeling and hand feel, and also has cotton permeability and warmth, so it is generally used for four-piece bedding. Antarctic velvet is generally used as underwear.