In many cases this is no more than a special belt worn by both wrestlers, while in others a special belted jacket and special trousers are worn. Catch-hold styles require the contestants to take a prescribed hold before the contest begins; often this grip must be maintained throughout the struggle. Loose styles of wrestling, which are used in modern international competition, commence with the wrestlers separated and free to seize any grip that they choose except such as are explicitly forbidden (e.g., taking hold of an opponent’s clothing or using a life-threatening grip, such as a stranglehold).