The Smartwool Men's Merino Box Briefs offers a solid foundation of comfort for someone looking for an ultra-comfy undergarment. These briefs are made of super soft/durable Merino wool blend fabric that will wick moisture and help regulate your body temperature no matter where you roam. They have a fully functional fly for easy on and off, flatlock seams to reduce chaffing, as well as a slim fit for a comfortable snug feel. The Smartwool Men's Merino Box Briefs will become a staple addition to your undergarment collection!