Merino is a breed of sheep that are prized for having the finest and softest wool. Merino wool is commonly used in high-end performance athletic clothing for running, hiking, skiing, mountaineering, and cycling.
Merino wool helps regulate body temperature, keeping the wearer warm without overheating. It also has a unique natural wicking attribute to keep skin dry during strenuous activity.
Merino wool is slightly water-resistant. However, if it becomes soaked it can retain water up to 1/3 of its weight. Unlike cotton, merino wool still retains its warmth even when wet, helping the wearer avoid hypothermia. Merino wool has a much higher warmth to thickness ratio than other types of wool, allowing athletes to be lighter weight and less bulky.