A dark brown cardigan and a crew-neck t-shirt matched together are a match made in heaven for guys who appreciate laid-back and cool outfits. This look is complemented perfectly with a pair of dark brown suede desert boots. When you're having one of those dreary fall days, sometimes only a cool outfit like this one can get you to face the outside world. Think you can't pull off cool off-duty outfits as you slip into your 60s? This combo should prove you wrong.