A bodysuit can be worn under other clothing items like a blazer, sweater or a cardigan without buttoning it. Use fashion tape: If you want to wear a bodysuit without buttoning it and you're worried about it slipping or gaping open, use fashion tape to keep it in place. Simply place the tape on the edges of the bodysuit and stick it to your skin. Wear it with a belt: If you want to wear a bodysuit without buttoning it and still want to define your waist, wear it with a belt. The belt will cinch in your waist and keep the bodysuit in place.