A crew-neck t-shirt and beige chinos will allow you to reveal your sartorial-savvy self. For a stylish hi/low mix, introduce blue high top sneakers to your look.
Blue High Top Sneakers with Crew-neck T-shirt Cold Weather Outfits For Men
If the situation allows an off-duty outfit, you can wear a crew-neck t-shirt and grey sweatpants. If in doubt about what to wear in the shoe department, introduce a pair of blue high top sneakers to the equation.