Muscle fit - our tightest option, closely fitted through the chest, waist and hem Ribbed material Polo knit Short sleeves 51% Cotton, 49% Acrylic Machine washable Our model Louis wears a size medium Model measurements: Height: 6'0"/1.83m, Chest: 37"/94cm, Waist: 31"/79cm Online exclusive: New extended sizes – 3XS – 3XL now available