These are dress pants from DRESS CAMP with a drawstring. They feel smooth and silky, so I think they're made of satin fabric. How about them for an "Onii-kei" or "Visual-kei" style? You can adjust the length of the wrinkles with the drawstring to create your desired wrinkle effect. The size is 44, so I think it's equivalent to S-M. I've included measurement photos, but please comment if you'd like additional ones. About 5 studs are missing from the upper back. Other than that, I think it's clean with no scratches or stains. Please refrain from purchasing if you are sensitive to used items.