The Smartwool Classic All-Season Merino Base Layer Bottom is built for four-season adventure, from ski days to campsite mornings. Made with lightweight Merino wool wrapped around a recycled nylon core, it delivers next-to-skin softness with added durability. A slim fit, Merino-lined waistband, and flatlock seams provide comfort and mobility, while the updated design ensures a better fit and cleaner look for all-day performance.

Key Features

• Lightweight Core Spun Merino fabric: nylon core with 100% Merino next to skin
• Slim fit designed to follow body contours for easy layering
• Flatlock seams minimize chafing during movement
• Merino-lined elastic waistband for comfort
• Fully functional fly for convenience
• Durable construction with updated fit for four-season use