From the Broad Minded Clothing Blog:
These Skinny-Fit Capri Pants are made of a black millennium fabric (also known as bengaline) that's a nylon/rayon/spandex blend. A sturdy, wonderful, stretchy fabric that won't fade! Features cute little slits in the bottom and belt loops if you want 'em! These pants can be paired with pretty much ANY top and look like absolute summer perfection!