The Smartwool Kids' Classic Thermal Merino Base Layer Crew Shirt keeps young adventurers warm, dry, and comfortable on all their winter activities. Made with 100% responsibly sourced Merino wool, it naturally manages moisture, resists odors, and regulates temperature for active kids. The crew neck and set-in long sleeves provide full coverage, while flatlock seams help prevent chafing during play or sports. Its slim fit follows the body's contours for easy layering under jackets and outerwear. Built for durability and performance, this base layer ensures children can focus on fun in the snow without distractions from cold or sweat.