The base coat can be worn directly on the body, with an underwear inside, and then it can be worn with any close-fitting clothes.

Functionally, it can be divided into body shaping bottoming shirt and ordinary bottoming shirt.

Body-shaping bottoming shirt has the functions of body-shaping, matching and external wear, and ordinary bottoming shirt is used for clothing matching. From the material, it is divided into wool, cotton and chemical fiber, among which the body-shaping bottoming shirt is mostly blended with animal and plant fibers. Functionally, it can be divided into body shaping bottoming shirt, warm bottoming shirt and matching bottoming shirt. Body-shaping bottoming shirt has the above advantages. Body-shaping bottoming shirt can be divided into modified type, adjusted type and covered type according to the modified parts.

Ordinary bottoming shirts are mainly warm. Body-shaping bottoming shirts are mostly uniform in size.