Product Overview This t-shirt is 100% cotton.It has a Mars exploration full color seal screen print. Reviews (1 review) Write a Review 1 Review Hide Reviews Show Reviews 5 Thank you ! I will buy again ! Posted by Michel Thomas on Jan 22nd 2020 Thank you so much for the excellent quality of the T-Shirt, the perfect conditioning and the following of the mailing to Europe. I will buy again ! Many thanks !