Content Menu● Introduction● Understanding the Importance of Layering● Best Undershirts for Wool Sweaters>> 1. Cotton T-Shirts>> 2. Moisture-Wicking Shirts>> 3. Silk or Silk-Blend Undershirts>> 4. Merino Wool Base Layers● Layering Clothes Under Wool Sweaters>> Collared Shirts>> Turtlenecks>> Camisole