The Twins Steel Cup groin protector features a steel cup and synthetic leather finishing. It is designed with three laces for a secure and comfortable fit. It is made to offer the protection needed in world-class MMA competitions. As with all Twins FIGHT GEAR, it will give you the performance and long-lasting durability you would expect from such a legend in the Martial Arts World. Its quality and craftsmanship are unsurpassed. Whether you are training in Muay Thai, MMA, or traditional karate you will not find a better Steel Cup Groin Protector anywhere else. Best to go with your underwear sizing.