Pump Chasers Vintage T-Shirt 60% Combed Ring-Spun Cotton 40% Polyester Maximum Comfort Slim, Athletic Fit Soft Material "Gun-Hugging" Sleeves Great to train in or for streetwear 60% Combed Ring-Spun Cotton 40% Polyester Sizing Based on Chest (inches): S: 36-38 M: 39-41 L: 42-44 XL: 45-48 2XL: 48-52 3XL: 52-56 Chest: Measure under arms around the fullest part of the bust. Be sure to keep tape level across back and comfortably loose.