A perfectly pieced together off-duty pairing of a dark green crew-neck t-shirt and blue jeans will set you apart in an instant. Rounding off with casual boots is a simple way to inject an extra touch of refinement into this getup. This look is also perfect if you're scouting for summertime wear to make a tedious day more bearable. Casual getups for stylish gents in their 30s aren't actually that hard, as you see.