The ladies' short sleeve bamboo tee and the racer-back bamboo tank are 67% bamboo lyocell/29%cotton/4% spandex jersey, moisture-wicking, anti-bacterial, hypoallergenic and breathable. There are no added chemicals and the prints are all dyed with ecofriendly dyes. Both shirt are extremely soft and stretchy, providing great freedom of movement. Both are comfortable enough for everyday wear and suitable for yoga class or any other activity.