The women's Extra Warm Merino Longsleeve Shirt is made from 100% finest 190s merino wool yarn. The natural thermoregulation of merino wool ensures optimal heat and moisture regulation, especially in cool temperatures. A special knitting process ensures an ultra-soft feel and excellent stretchability. Merino wool is characterized by its thermoregulating, odorless, easy-care and crease-free properties. The curled fibers form air chambers that trap body heat. This functional shirt offers maximum comfort and natural thermal protection for demanding outdoor activities.