Muscle fit - our tightest option, closely fitted through the chest, waist and hem Short sleeves 1/2 Zip fastening 51% Viscose, 49% Acrylic Machine washable Our model Karl wears a size medium Model measurements: Height: 6'3"/1.91m, Chest: 36"/92cm, Waist: 31"/78cm Online exclusive: New extended sizes – 3XS – 3XL now available