A mint long sleeve shirt and a white crew-neck t-shirt are absolute menswear must-haves if you're picking out an off-duty wardrobe that matches up to the highest style standards. Round off this ensemble with olive suede work boots to change things up a bit. This one is an obvious idea when it comes to a kick-ass outfit that transitions easily into fall. This combination proves that passing the big 3-0 is no reason to shed casual style altogether.