The Smartwool Men’s Active 1/4 Zip keeps you warm without overheating during cool-weather runs, jogs, or workouts. Combining Merino wool with TENCEL™ Lyocell fibers, this lightweight layer manages moisture, regulates temperature, and resists odor, while targeted mesh zones and offset seams enhance comfort and breathability. Reflective details and a front zipper make it an easy go-to for early-morning or evening training sessions.

Why You’ll Love It

• Regular fit allows full mobility without extra bulk
• Merino + TENCEL™ blend for temperature control, odor resistance, and moisture management
• Targeted mesh zones for added breathability
• Offset shoulder and side seams to minimize chafing
• Front zipper (7.5") and locker loop for convenience, plus reflective elements