It's these easy cotton shirts we're loving right now. This one is tunic length and has an adjustable slider belt to define the waist, cut in our softest cotton flannel Relaxed fit: Relaxed fit through shoulders, chest and waist. Button-down collar. Button front and adjustable slider belt. Shirttail hem. Relaxed fit: Relaxed fit through shoulders, chest and waist. Long sleeves. Tunic length.