The high-end fashion brand that prominently features its iconic "CD" logo on its t-shirts is Christian Dior. Christian Dior, often referred to as Dior, is a luxury fashion house known for its exquisite designs, including clothing, accessories, and fragrances. The "CD" logo, which consists of the intertwined initials of the brand's founder, Christian Dior, has become a recognizable symbol of the brand and is often displayed prominently on various Dior products, including t-shirts.