This is due to the prevalence of light and thin personal clothing on the catwalk, and the models began to drive changes in underwear. Most of the early thongs emphasized sexy style, and the wavy lace or ultra-fine elastic band on the back buttocks T-shaped part was charming, but it also limited the consumer population. In recent years, with the improvement of women's requirements for wearing comfort of underwear, coupled with the trend of seamless underwear, plain thongs have become popular. After the sexy thong, the functional thong that emphasizes no trace has greatly improved the thong market.