It's these easy linen shirts we're loving this summer. This one is tunic length with an adjustable slider belt to define the waist. Relaxed fit: Relaxed fit through shoulders, chest and waist. European Flax™: This guarantee of traceability for premium linen fiber grown in Europe—a natural and sustainable fiber, cultivated without artificial irrigation and GMO-free. Button-down collar. Button front and adjustable slider belt. Shirttail hem.