Black Diamond Equipment Rhythm Tee Built for ultimate freedom and mobility, the Rhythm tee features NuYarn merino wool technology- making it significantly lighter than any other wool shirt on the market, while increasing performance at the same time. The Rhythm&';s NuYarn fabric dries five times faster than standard merino, while providing 35% more stretch. This means the Rhythm Tee is the ultimate high output, breathable layer or trail running shirt Features Nuyarn Wool- superior merino wool fabric that&';s lighter, stronger and dries faster Machine washable Certified non-mulesed Merino Wool Slim XS-XL 69 g Vietnam Tech Specs Materials: Wool Nylon Blend Single Jersey (57% Nylon, 43% Merino Wool, 95gsm) Size Range: XS-XL Weight: 69 g