. From trail hiking to mountain biking, SmartWool’s PhD Outdoor Ultra-Light socks do it all. Merino wool
naturally wicks moisture and regulates temperature in every season. High-density impact zones absorb shock, and mesh MVT zones ventilate.
- Ultra-light cushion in the sole
- Itch-free merino wool naturally regulates temperature, wicks moisture and doesn’t retain odor
- Quarter-crew height
- Made in United States of America (yarn imported)
- Visit our Wool Guide
- US shipments only