Delong fabric is actually a new modern fabric, which is also called "diamond wool" because of its smooth and shiny surface. Most commonly used for personal items. The lining wool is thick and dense, very elastic and not easy to deform. It can achieve the advantage of self-heating when used in thermal underwear in cold winter. The biggest advantage of velvet vest is that it has no sense of bondage, and it abandons the conventional long-sleeved style, which is very helpful for girls with meat, especially releasing the arm lines and reducing the feeling of happiness.