For something more on the off-duty side, opt for this combination of a grey short sleeve shirt and a charcoal crew-neck t-shirt. Introduce a pair of black canvas desert boots to this look to effortlessly dial up the style factor of any look. When spring is in the air, you'll appreciate how great this getup is for winter-to-spring weather. Ideal if you're on the hunt for some amazingly inspiring 20-something casual style.