We weave hemp and organic cotton yarns together to make this subtly textured, breathable and naturally anti-microbial fabric. (Fun fact: hemp is three times stronger than Cotton.) It's made with organic cotton that is grown without chemical fertilizers and pesticides from non genetically modified seeds. Cotton/hemp material - 55% hemp, 45% cotton Machine wash. Size Large in a slim fit I also offer a great bundle discount of 20% off 2+ items!