Photosynthesis UV-Sensitive Women's T-Shirt eaves and roots grow out of the formula when the shirt is exposed to UV light. The leaves and roots are visible but very faint indoors. The whole glorious mess is printed on an eco-friendly 100% certified organic cotton, 4.3 oz. natural (off-white) women's t-shirt. For maximum life of the design, machine wash cold, inside out. Do not iron.