Product Details Warmth that won't weigh you down. Our lightweight, striped base layer shirt protects you from the cold and resists odors for comfort during outdoor activities. Fabric & Care Itch-free 100% merino wool, natureâs best insulator. Machine wash, line dry. Additional Features Fine-gauge knit, with flat-lock seams that won't bind. Lightweight fabric provides warmth during a range of activities and temperatures. Naturally resists odors. Thumbhole cuffs keep sleeves snug at wrist. Imported. Return Policy Questions? Chat with an Expert