The 150 Cool Logo LS W by Ortovox is a sustainably cooling basic long-sleeved shirt with functional properties. It is made from 150 Merino Cool fabric and is ideal for active alpinists. The secret of its cooling effect lies in the blend of the two natural fibers merino wool and Tencel. Tencel is obtained from eucalyptus wood and is characterized by a high basic fibre moisture content, a high evaporative cooling capacity and its smooth fibre surface. The result is a cooling effect on your skin and high durability. The material mix is robust and efficient thanks to an elaborate spinning process: Beta-spun technology refers to a manufacturing process in which fine polyamide filaments are spun around the merino wool and Tencel. The protective polyamide coat makes the fabric extremely abrasion-resistant and robust - without losing the benefits of merino fibers and the cooling Tencel fibers. Thanks to its anti-odour properties, you can easily wear the long sleeve shirt several times between washes. In short, a perfect first layer - functional, natural and sustainably cooling - ideal for mountain sports, climbing or other outdoor activities.