Description A durable, long-lasting T with all the technical benefits of Merino wool. Super soft Merino wool wicks away moisture, controls odor, and regulates your body temperature, so you're warm in the winter and cool in the summer. Added nylon makes it extra durable and machine washable. Sizing Regular fit, slight ease 34 3/8" center back sleeve length (measured from medium) Specs Custom-developed Ultra Merino Wool 70% Merino wool, 30% nylon 5.3 oz./sq. yard Moisture wicking and anti-microbial Made in South El Monte, CA Care Machine wash cold delicate with like colors only and remove promptly Do not bleach Lay flat to dry Cool iron