THIS ITEM RUNS SMALL. Size up to ensure proper fit. COMFORTABLE AND SOFT: Made of soft, lightweight 100% cotton jersey, these everyday must-have for layering under dress shirts offers maximum comfort and breathability. REGULAR FIT: Natural ease on body featuring a ribbed crew neck collar. LACOSTE'S SIGNATURE: Crocodile tag at the bottom of the garment EASY CARE: They are machine washable and should be line dried, making them a practical choice for everyday wear while ensuring they retain their shape and comfort over time.