Relwen’s buttondown shirts are tried-and-true closet staples. This long-sleeve shirt has a classic fit with a rounded shirttail waist that tapers in the perfect amount—ideal for wearing tucked—and the timeless twill goes with damn never everything. With clean-finish, single-needle sewing throughout and a single chest pocket, this smart casual buttondown is well-equipped to stand the test of time (and however many dress code variations your office cycles through).