A beige crew-neck t-shirt and navy corduroy cargo pants are a smart combination worth having in your off-duty arsenal. If you want to break out of the mold a little, introduce athletic shoes to the mix. Can you see how very easy it is to look seriously stylish and stay cozy when chillier weather comes, thanks to this ensemble? This combination demonstrates that as a 40-year-old gentleman, you have a vast array of style options.