This article is from the Running FAQ, by Ozzie Gontang with numerous contributions by others.
This is a cloth with nylon threads running one direction, cotton in the
other. It was the standard wind parka material before Goretex came along,
and is considerably less expensive. Good wind resistance, fairly
breathable. Somewhat water resistant, especially if you spray it with
Scotchguard, but won't hold up to a heavy rain.