Industry standard brands, soft ringspun cotton, contoured, slim fit, high quality resolution digital to garment (DTG) process, firsts, medium to light weight, and of course–nonprofit! Proceeds go to climate science outreach, 100%. These traditional messaging shirts have a mission, and they do it with style and fashion. 100% cotton, except a few heather colors are 90%. Suitable for women, or whoever. For best performance, wash gentle, cool, inside out.