Like Olivia Palermo, above, I'll be running around this fall with a track jacket. I love its right-this-minute sporty edge and, at the same time, it's a little unexpected looking, especially with sky-high heels. Practically speaking, it's a layer that's not too hot and not too cold--just right! Olivia's jacket is past season Boden. I like these by Joseph, Pam & Gela, Fred Perry, and Adidas.