100% Polyester. Fabric: Garment Dyed, Interlock, Knitted, Spun Dyed. Design: Plain. Neckline: Crew Neck. Sleeve-Type: Short-Sleeved. 135gsm. Sustainability: Environmentally Friendly, Oeko-Tex Standard 100 Certified. XS: 37 in. S: 39 in. M: 41.5 in. L: 44 in. XL: 47 in. XXL: 50 in. 3XL: 53 in. 4XL: 56.5 in. 5XL: 60 in. Ref: UTBC5855