Salewa Med Warm Amr 27967-0310Optimal heat managementBase layering is essential during intense missions in cold temperatures. The Zebru Half Zip T-Shirt is a performance base layer made from ultra-fine merino wool (64%) for optimal heat management, temperature regulation and next-to-skin comfort. It uses thermal body mapping and our proprietary Responsive technology to help you manage your body temperature.Far-infrared textile technologyNamed after Monte Zebrù (3,735m) in the Ortler Alps on the border of South Tyrol and made in Italy, this performance base layer consists of It is made primarily of merino/polymer fibers blended with responsive polyamide yarns filled with a unique blend of natural thermoreactive minerals. Responsive is an intelligent fabric that harnesses infrared energy by absorbing far infrared (FIR) radiation emitted by the body and gradually re-emitting it back into muscle tissue. Studies show that it increases blood flow, improves cell efficiency and promotes greater oxygenation, so you can perform better and recover faster. What's more, Responsive is an integral part of the fiber - it will last the life of the garment and will not wash out.Zebru has a slim, athletic fit with high performance, and a half-length zipper allows you to quickly seal in warmth or release heat as needed. Advanced tubular knitting process creates a seamless torso sewn from one piece, which provides greater comfort without chafing. Merino wool is also resistant to unpleasant odors and requires less washing.Thermoregulating, efficient merino thermal underwear for multi-day use and intensive alpine activity in variable conditions. Zippered collarSmooth sides without seamsComfortable fit thanks to flat seamsHigh merino wool content: breathable, insulating and provides a natural feel on the skinResponsive technology: thermoregulation and regeneration