Experience superior warmth and comfort with the Smartwool Classic Thermal Merino Base Layer 1/4 Zip. Designed with an updated fit for enhanced functionality and style, this heavy base layer is ideal for cold-weather activities. Crafted from 100% responsibly sourced Merino wool, it features shoulder panels and flatlock seam construction to minimize chafing. Perfect for skiing, hiking, and running, this base layer keeps you comfortable and temperature-regulated during high-intensity adventures.

Features:

• Fit: Slim
  
• Our slim fit is intended to follow the contours of the body
  
• Fabric helps combine the moisture management, temperature regulation, and odor resistance of 100% Merino wool with interlock knit for comfort
  
• Flatlock seam construction and offset shoulder and side seams designed to help increase comfort and minimize chafing
  
• Side seams wrap to front
  
• Size medium center-front zipper: 10" (25 cm)
  
• Made in Vietnam: 100% Wool-Merino