Why not consider teaming a dark brown crew-neck sweater with a tank? As well as totally comfortable, both of these items look awesome when married together.
Dark Brown Crew-neck Sweater with Tank Outfits For Men
This pairing of a dark brown crew-neck sweater and a tank is the perfect foundation for a casual and cool outfit. Rounding off with a pair of beige suede desert boots is an easy way to add an extra dimension to this outfit.