Underwire PP is the new style underwire that has a molded sewn-in preformed pad that gives a superior lift with full overall padding. The top increases bust size by approx. one cup size and the dynamic lift and push-up style provides a natural look to the bust's cleavage. They do not come in D or DD cups. Underwire TR is the traditional underwire top with D and DD sizes that we had for years. The top comes with self-insertable pad for S, M and L sizes. D and DD sizes do not come with pads. Check for size availability by clicking on "Select Size". Powerpad Underwire has more padded look and slightly thicker then the new style tops.