Mid-weight 8.25 oz., 80% Ringspun Cotton, 20% Polyester.Unisex Sizing:Small –  Chest 20: Across Chest From Seam To Seam – Length 27Medium – Chest 22: Across Chest From Seam To Seam – Length 28Large –  Chest 24: Across Chest From Seam To Seam –  Length 29X-Large – Chest 26: Across Chest From Seam To Seam – Length 30XX-Large – 28: Across Chest From Seam To Seam – Length 31XXX-Large – 30: Across Chest From Seam To Seam – Length 32