For something more on the casually cool end, you can go for a charcoal horizontal striped crew-neck sweater and a white crew-neck t-shirt. Add dark green athletic shoes to the equation to keep the ensemble fresh.
White Crew-neck T-shirt with Charcoal Horizontal Striped Crew-neck Sweater Outfits For Men
This combo of a charcoal horizontal striped crew-neck sweater and a white crew-neck t-shirt is effortless, on-trend and very easy to imitate. You could perhaps get a little creative with footwear and tone down this look by rocking a pair of black athletic shoes.