Undercover Comfort

The best underwear gives you the benefits of Merino wool construction in the garments close to your skin. The temperature regulation and moisture control found in wool underwear helps keep you comfortable, all day.


No matter if you’re lounging at home or are about to go on a three-day hike-in hut trip, our Merino 150 underwear is designed for comfort and distance. Ultra-comfy Merino next to skin helps regulate body temperature, manages moisture, and resists odors. And thanks to our Core Spun durability technology, these underwear will keep you comfy, no matter where the day takes you.

  • + 100% Merino next to skin
  • + Merino-lined, wide elastic waistband
  • + Quick Dry
  • + Breathable
  • + Manages sweat
  • + Odor-resistant
  • + Regulates Body Tempature

Seamless Underwear and Bras

Smartwool’s Seamless bras come in two different styles—racerback and strappy. They both feature engineered knit cups that are designed to provide shape and lift and a seamlessly knit Merino wool interior for enhanced next-to-skin comfort. The wide straps on the racerback bra provide additional support, while the removable cups in the strappy bra provide additional coverage.