This 3 piece set includes a slit side skirt with button opening, a small leg belt, and black lycra shorts.

The belt is just a small regular belt, you can set it to a tight setting close to your dolls thigh size and then slide it up for a snug fit.

This black has not stained in my testing so far as my tea Smart Doll wore it for over a week. Still exercise the usual caution with black fabrics, don't wet it while on the doll, check for stains regularly, etc.