150 gsm- Meet the Duckworth Vapor Tee, a perfect collision of fashion and function. Made with single-origin Montana Merino Wool and our proprietary Vapor Wool fabric, the tailored-fit, heathered-look Vapor Tee is lightweight, soft, cooling, antimicrobial (odor-free), moisture-wicking, ultra-fast-drying, and 100% American-made. A high-end T-shirt, performance-tested by the rugged mountains of Southwest Montana - how could another ever compare?