A 3-piece suit adds a vest to the classic jacket and trouser combination, giving you a more complete and polished look for weddings, formal events, and any occasion where a standard suit feels like it needs something more. Men's Wearhouse carries them in slim, modern, and classic fits across wool, performance stretch, and wool-blend fabrics, in colors including black, charcoal, navy, grey, and seasonal tones. Shop brands like Calvin Klein and Tommy Hilfiger, with free in-store alterations included on every purchase.