For a casual outfit, wear a blazer with a navy and white crew-neck t-shirt — these two pieces play really great together. Brown leather casual boots look perfect completing your outfit.
Navy and White Crew-neck T-shirt with Blazer Chill Weather Outfits For Men
Choose a blazer and a navy and white crew-neck t-shirt for a no-nonsense look that's also put together. Introduce a pair of brown suede double monks to your outfit to avoid looking too casual.