For a relaxed casual ensemble, consider pairing a crew-neck sweater with a dark brown long sleeve shirt — these two pieces work nicely together.
Dark Brown Long Sleeve Shirt with Crew-neck Sweater Outfits For Men
Pair a crew-neck sweater with a dark brown long sleeve shirt for relaxed dressing with a contemporary spin. If you want to immediately polish off this ensemble with a pair of shoes, complement your getup with black leather chelsea boots.