evo.com | Smartwool Long Underwear Tops > The Smartwool Classic All-Season Merino Base Layer Crew is the layer that works quietly behind every adventure. Soft 100% Merino sits next to skin while a lightweight recycled nylon core adds everyday durability. Built for changing temps, long days, and whatever gets added to the itinerary. Side Seams Wrap to Front for Body-Enhancing Fit Slim Fit Flatlock Seam Construction to Minimize Chafing 88% Merino Wool / 12% Recycled Nylon | Smartwool Classic All-Season Base Layer Crew Top Men's 2027 - Large Green | Nylon/Wool