A rehydration clause is a weight limit that a boxer is allowed to put on ahead of the main fight. It is a tactic often reserved for boxings biggest divas. The clause helps to ensure a fair fight by setting a limit on how much weight the fighters can put back on between the weigh-in and the fight itself. This is because boxers can lose pounds very quickly through sweating to make weight, and in theory, one or both of the fighters could make the weigh-in and then pile on the pounds to gain a huge advantage over their opponent. The rehydration clause stops one or both fighters from making themselves a lot heavier and potentially putting their opponent in danger. The International Boxing Hall of Fame (IBHOF) looks after the WBC, WBA, WBO, and IBF matches and their moral grounds, and many of the big boxing matches are looked after by the organization to maintain the authenticity of a professional fight. The rehydration clause is put in place to ensure fair play on the day of the fight.