
REI Co-op Men’s Heavyweight Merino Base Layer Half-Zip Top $49.83 at REI.
- Made with 100% merino wool that naturally wicks away sweat, resists odors and dries quickly
- UPF 50+ sun protection
- Collar with half-zip neck lets you ventilate as needed
- Thumbhole cuffs hold sleeves in place and help seal warmth in
- Underarm gussets are made for ease of movement
- Shoulder seams are rolled forward to help prevent chafing under pack straps
- Close-to-body fit for optimum performance