A white and red vertical striped long sleeve shirt and navy jeans are among those extremely versatile menswear must-haves that can completely change your wardrobe. Dark brown leather casual boots will infuse some extra polish into an otherwise mostly dressed-down outfit. And if you're on the hunt for a neat winter-to-spring look, this one fits the task well. This combination should prompt anyone who was hesitant about wearing casual outfits as an older guy.