Men's sexy bikini open-back pants. The size is free, and the color is navy. The fabric is thin and soft, and it's see-through. I think it feels good to wear. The back has thin strings, allowing you to adjust it to fit your buttocks or make it tighter, maximizing sexiness. Although it's free size, the flat waist measurement is about 34cm, so it's likely equivalent to a size M-L. The model photos show the use of front pads, but these are not included with this product, so please be aware. How about it for everyday wear or playing with your partner?