A miracle bra is a type of bra designed to enhance the appearance of the bust, often through padding or push-up features. The term “miracle bra” became popular with a specific product from Victoria’s Secret, which promised to add up to two cup sizes and create a more pronounced cleavage. While they can be effective for certain body types, miracle bras may not be as comfortable for all-day wear, especially if they rely heavily on padding or underwires for their effect.