The COS shirting collection strikes a balance between formal and casual. This piece is made from brushed TENCEL™ Lyocell and cotton and tailored in a relaxed fit that layers well over tees. It has buttoned cuffs and a pocket on the chest. Relaxed fit Button closure TENCEL™ is a trademark of Lenzing AG. TENCEL™ Lyocell is made from renewable wood sources, using a process that recycles 99% of all chemicals and water Shell: 51% TENCEL™ Lyocell, 49% Cotton. Excluding trims / Machine wash Back length of size M is 30.51" / Model wears a size M