“Cypress original bamboo. I've worn it three times in the last week as I love the color and fit. I am 5'5 and usually wear a M in tops. The length is flattering on me as so many shirts tend to either be cropped or very long. This one hits exactly as I prefer. The shirt did wrinkle badly when I laid down for a quick nap but the wrinkles also seemed to disappear quickly once I was up and moving around again. Very happy with my purchase.”