The Coldpruf Women's Plus Size Platinum Mid Weight Crew Shirt features two layer construction, specifically engineered with Coldpruf Technical Fiber and merino wool to trap air between the layers of fabric, providing a natural barrier of warmth. The Women's Platinum Mid Weight Crew Shirt is designed to provide warmth and comfort in very cold to extremely cold weather, during mid to high activity. Inner layer constructed of 100% Coldpruf Technical Fiber CTF performance polyester. Outer layer constructed of 30% merino wool,70% polyester. CTF fabric provides superior moisture movement. CTF features Antimicrobial AlphaSan by Milliken to keep your garment looking great and essentially odor free. Hemmed cuffs. Flat lock construction on all seams. Tagless label for additional comfort. Assembled in Mexico of USA made components.