A gilet and a white and black long sleeve t-shirt are absolute must-haves if you're putting together an off-duty wardrobe that holds to the highest fashion standards. If you need to immediately elevate this outfit with one single item, introduce a pair of brown leather casual boots to the mix. So when spring is in full effect, this look is likely to become your most worn. Ideal if you're looking for some incredibly inspiring relaxed casual style for 30-something Millennial gentlemen.