Smartwool Men's Classic All-Season Merino Base Layer Pants - A year-round favorite, this Classic All-Season Merino Base Layer Bottom works hard to keep you comfortable everywhere, from the ski lifts to the campsite. With an updated fit to improve functionality while enhancing aesthetics, these bottoms stay durable while 100% Merino next to skin keeps you comfy and ready for more action. This gear is built for four seasons of adventure. Fit: slim - intended to follow the contours of the body Lightweight Merino jersey fabric uses a recycled nylon core to increase durability while still keeping 100% Merino wool next to skin Flatlock seam construction designed to minimize chafing Fully functional fly Merino-lined elastic waistband designed for maximum comfort Size medium inseam: 30.75in (78cm) 88% Merino Wool, 12% Nylon Style: SW016958