Use a sweatshirt or pair of sweatpants you already own as the centerpiece of your athluxury outfit. Upgrade them with heels and some statement jewelry.
A tennis skirt is timeless, comfortable, and goes with almost any shirt, tucked or untucked. Pair it with a cute pair of flats; don't be afraid of bold colors.
Finish off your sweatshirt-skirt look with a purse representing your favorite team or sports logo, or imprint old letterman jackets onto your favorite mini bag.
A luxury, designer-brand sneaker can instantly dress up any outfit. Walk to work in Originals Astir Sneakers from Adidas or Nikki Sneakers from Kate Spade.