C-shaped pants are a kind of invisible underwear. In fact, C string is a reform of thong, and it saves a lot of cloth, even the waist part. Stick a C-shaped thing directly below to protect private parts, so it's called a C-string. This is the latest fashion underwear, but it doesn't have a waist belt like a thong. It has an elastic C plastic card fixed between people's thighs.

C-pants are specially designed by American designer David for drying model wives. Tightly cover the most intimate parts of women, no ligature marks, no signs of sunburn. The side looks like the English letter C, and the front looks like a sanitary napkin. It is quite popular in Europe and America.