Is A Buckle Or Slip On Shoe As Supportive As A Tie?

No, they are not. Ties are always going to be more supportive by the mere fact that the heel fit can be pulled firmer around the foot. This will give the foot better stability and control any sort of foot orthosis. However, fitted properly, the buckle would be far better than the slip-on. We often fit buckles with built-in supports or add foot orthosis and recommend that they not be worn over a prolonged period of time if the customer has a history of foot discomfort.