In this blog post, Olivia + Laura share are the fall fashion pieces men should have in their closet this season!Fall is the season of football, pumpkin spice everything, and, well, some seriously great fashion for men. Whether you're a fashion enthusiast or simply looking to upgrade your wardrobe, this season offers opportunities to exude warmth, sophistication, and comfort.Basic and classic is the theme for this season, in both men's and women's fashion. So these are the must-have fashion…