For something on the off-duty side, consider pairing a black short sleeve shirt with a crew-neck t-shirt. You could stick to a more casual route with footwear by slipping into a pair of black leather work boots.
Black Short Sleeve Shirt with Crew-neck T-shirt Cold Weather Outfits For Men
A black short sleeve shirt and a crew-neck t-shirt are a combination that every stylish gent should have in his off-duty sartorial arsenal. Finishing off with a pair of white canvas high top sneakers is a guaranteed way to add a fun touch to your outfit.