Piranha Gear Vale Tudo Shorts - Jiu-Jitsu & No-gi Grappling from polyester With a shorter thigh length, fully lined (so it's a bit more... ahem... modest...), and an elasticized drawstring waist, we originally intended these for people that practice MMA or UFC mixed martial arts... ...but they work just as well for Muay Thai, Kickboxing, Karate, Boxing, and anytime you want something a little more substantial than a Speedo type brief like under your wetsuit for SCUBA diving. A spandex / polyester blend (80/20) much higher than is typical with vale tudo shorts - we want these to last a long time - not get stretched out after six months. Very popular for BJJ practitioners and general grappling too!