"Unisex Pinnacle Merino Boot LinerThe Pinnacle merino base layer series is the next must-have in your collection. Made of 95% merino wool and 5% elastic, the Unisex Pinnacle Merino Boot Liners provide that little bit of extra warmth that makes all the difference in colder temps. Merino wool is naturally breathable, odor resistant, ultra fast drying, non-itchy, and easy to care for, all while maintaining four-way stretch. Small but mighty- these boot liners are ultimate MVPs during the colder seasons.90 Day Warranty"