For something more on the casually cool side, you can wear a grey crew-neck sweater and a crew-neck t-shirt. This combo is a good illustration that wintertime needn't herald the absence of style.
Grey Crew-neck Sweater with Crew-neck T-shirt Smart Casual Winter Outfits For Men
A grey crew-neck sweater and a crew-neck t-shirt are a good getup to keep in your casual lineup. Why not complement your outfit with a pair of white and navy leather high top sneakers for a laid-back touch? During the winter months, when warmth is key, it can be easy to surrender to a less-than-stylish look in the name of practicality. But this look proves that you totally can stay snug and remain stylish in the winter months.