Barefoot running. No Nike or ASICS on your feet.
No shirt. No socks. No bandana.
If the running minimalism religion takes off, who will Runner's World sell ads to? Lady Godiva Running Club? That issue would sell better than the Sports Illustrated Swimsuit Edition.
The idea of being free from things contraining a good run is important, but the marketing trend push it as an idealogy seems counter to the point.
Zola Budd ran without shoes before it was cool: Amazon.com Books: Zola Budd
The Barefoot Running Book Second Edition: A Practical Guide to the Art and Science of Barefoot and Minimalist Shoe Running Hmm?