ASICS Mens Marathon Singlet Polyester,Spandex Imported Machine Wash ASICS Size Guide Run that extra mile in this ASICS&reg; singlet! Fitted cut hugs the body for maximum support during high-performance activity. Round neckline. Sleeveless construction. Racerback styling allows arms complete range of movement. 100% polyester;Insert: 90% polyester, 10% spandex. Machine wash cold, tumble dry low. Imported. Measurements: Length: 30 in Product measurements were taken using size LG. Please note that measurements may vary by size.