cool. Courtesy of Christian Vierig/Getty ImagesNo T-shirt, no problem! Emphasize a deliciously soft with a relaxed open button-down and matching jeans. This kind of tonal outfit is perfect for minimalist tastes, with rectangular shades completing the look. Courtesy of Jeremy Moeller/Getty ImagesHumble grandpa knits made their way into our wardrobes last spring, and they're officially back for fall.