To look like a complete gentleman, consider pairing a white and red dress shirt with a black overcoat. Casual boots are a fail-safe way to give a dash of stylish casualness to this look. As you're transitioning from your 20s to your 30s, you want to start dressing in a more elegant manner. In this case, combos like this are a safe option.
White and Red Dress Shirt with Casual Boots Dressy Cold Weather Outfits For Men In Their 20s
Team a white and red dress shirt with a grey gingham overcoat if you're going for a neat, classic outfit. And if you need to immediately play down this ensemble with one single piece, why not finish with casual boots? A great example for young men aiming to move their style towards maturity.