The Smartwool Men’s Classic Thermal Merino Base Layer Crew is a cold-weather essential updated for better fit and function. Made from 100% Merino wool, it naturally manages moisture, regulates temperature, and resists odor, keeping you comfortable during skiing, hiking, climbing, or biking. Thoughtful design features like flatlock seams, offset shoulder and side seams, and shoulder panels eliminate chafing for all-day comfort. Its slim fit follows the body’s contours, and the interlock knit ensures soft, durable wear for winter adventures.

Fit: Slim (follows body contours)

Fabric: 100% Merino Wool

Features:

• 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

 

Men's Smartwool Apparel Size Chart

 

Size	Small	Medium	Large	X-Large	XX-Large
Chest	36”–38” 91.5–96.5 cm	39”–41” 99–104 cm	42”–44” 106.5–112 cm	45”–48” 114.5–122 cm	49”–51” 124.5–129.5 cm
Waist	29”–31” 73.5–78.5 cm	32”–34” 81.5–86.5 cm	35”–37” 89–94 cm	38”–40” 96.5–101.5 cm	41”–44” 104–112 cm
Hip	36”–38” 91.5–96.5 cm	39”–41” 99–104 cm	42”–44” 106.5–112 cm	45”–48” 114.5–122 cm	49”–51” 124.5–129.5 cm
Arm Length	31”–32” 78.5–81.5 cm	32”–33” 81.5–84 cm	33”–34” 84–86.5 cm	34”–35” 86.5–89 cm	35”–36” 89–91.5 cm
Inseam	30”–31” 76–78.5 cm	31”–32” 78.5–81.5 cm	32”–33” 81.5–84 cm	33”–34” 84–86.5 cm	34”–35” 86.5–89 cm