Merino wool is an excellent insulator and can trap body heat to keep you warm in cold weather. At the same time, it's also highly breathable, which means that it can allow excess heat and moisture to escape from your body, preventing overheating and discomfort. This unique combination of insulating and moisture-wicking properties makes Merino wool an ideal choice for cold weather base layers. This makes Alpine Fit’s Merino wool base layers the ideal choice for enjoying outdoor sports and activities.