The Deerhunter Quinn Merino ½-Zip Undershirt is made of 100% merino wool and lined with natural viscose bamboo fabric, making it soft and cozy. With temperature-regulating capabilities and natural antibacterial properties, it is the perfect base layer for cold-weather adventures. Plus, Deerhunter's signature 2-way stretch adds an extra touch of natural warmth and comfort. Dare to challenge the cold with the Merino ½-Zip Undershirt!