modus vivendi brief sumo customizable twist with open front snap turquoise 16512Here's how it works: A single rectangular piece of fabric attaches to the waistband in front and in back. The waistband snaps open in front, letting you twist the fabric that will lie between your legs You can twist the fabric as much or as little as you like. Twist it a little for a roomier pouch and more coverage in back or twist it a lot for a skimpier thong effect. When it's time to have fun, simply pull the pouch off and you're good to go!