For unbeatable defense against cold weather, SmartWool's NTS Mid 250 Zip T delivers with the softness, warmth, and moisture-managing performance of pure merino wool.

• NTS (next to skin) Mid 250 base layer for cold-weather performance
• Fine merino wool fibers provide supersoft, itch-free comfort and warmth SmartWool breathes, manages moisture, regulates temperature, and naturally resists odor
• Interlock knit; UPF 50+ for maximum protection from the sun
• 8 in. (20 cm) center-front zipper with semi-locking logo slider
• Back body seam wraps to front for body-enhancing fit
• Raglan sleeves eliminate top shoulder seams for comfort when wearing a pack
• Flatlock seam construction designed for chafe-free comfort
• Heat transfer logo at left sleeve cuff
• Form fit: Slim fit; follows the contours of the body