100% Merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance. Turtleneck is not too tight, not too loose around the neck—just right. This a shirt that can be worn anywhere: to work under a blazer with nice pants, to a pottery class, to sleep at night, or out for a run in cooler weather. The fabric is soft and warm but breathable and not too hot, and it keeps odor at bay.