Men's Smartwool Classic Thermal Merino Base Layer One Piece

Meet the Men's Classic Thermal Merino Base Layer Crew One Piece, which provides a full-body layer of warmth. This 100% Merino wool one piece combines the moisture management, temperature regulation, and odor resistance of Merino with the comfort of an interlock knit. Featuring a fully functional fly, a zippered drop seat, set-in sleeves, and a flatlock seam to help prevent chafing, this base layer is designed for easy wear and maximum comfort.

• 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 designed to minimize chafing
• Set-in sleeves
• Side seams wrap to front for a more distraction-free fit
• Zippered drop seat
• Fully functional fly