Men's sexy bikini open-back pants. The size is free, and the color is black. The fabric is thin and soft, and it's see-through. I think it feels good to wear. The back has thin strings, which can be adjusted to fit the buttocks or create a wedgie effect, making it very sexy. Although it's free size, the flat waist measurement is about 34cm, so it's probably equivalent to a size M-L. The model photos show the front pad, but it is not included with this product, so please be aware of that. How about it for everyday wear or playing with your partner?