Chasing after kids at a playground is no joke. It requires fast, comfortable shoes, water bottles, possibly snacks, and two free hands. It may also require an adult beverage for me, but that's another story.
Jacket: The North Face Canyonwall Fleece Jacket. I love this because the WindWall barrier inside keeps me warm without being very bulky.
Leggings: Spanx Faux Leather Leggings
Shoes: Adidas Ultraboost X
Backpack: Rebecca Minkoff