Made in small batches: slight variances in size and color. MOST SHIRTS do not have labels at the bottom of the shirt. Words from Manufacturer: Bamboo is one of ONNO’s lightweight t-shirts . Fit: tailored, flattering but not too tight. Based on reviews, these shirts run a dash small. If you’re between sizes, or like a looser fit, we recommend sizing up. To prevent shrinkage, wash cold and tumble dry low. Washing hot and drying hot can cause your shirt to shrink up to half a size. 70% viscose from organic bamboo, 30% organic cotton.