When unpredictable weather is on the horizon, wear the Women's Midweight Meghan 1/2 Zip Long-Sleeve Shirt as your base layer. The moisture-wicking, quick-drying fabric ensures you'll be dry and comfortable. Flatlock seams and a tag-free neckline reduce irritation and chafing. Quick-Drying and Moisture Wicking Flatlocked Seams for Added Comfort Tag-Free Neckline 90% Polyester, 10% Elastane Single Jersey 5.4 oz/yd Size Medium only.