Swimwear refers to clothing worn during swimming, diving, or water related activities. The shape of swimming trunks is similar to underwear, but the fabric is usually different. Swimwear is mainly divided into four categories: triangle, square corner, fun and Thong. According to the waist style, swimming trunks can be roughly divided into six categories: high waist, normal waist, low waist, ultra low waist, and so on.