From top left, clock wise: Hype $164.9 available at DSW, Zara $89.90, Paul & Joe $565 available at Net-a-Porter, Fossil $148 available at Macy's. Courtesy photos.

It's no secret that the Proenza Shoulder PS1 bag is the holy grail of messenger bags.

But with a hefty price tag ranging from $895 to $14,500, ample storage space and utilitarian design it only makes sense that Lazaro Hernandez and Jack McCollough's masterpiece is a closet staple for the likes of Leighton Meester, Kirsten Dunst and Chloë Sevigny.

But for us common folk, there's hope!

Our friends at Refinery 29 rounded up some of the best heavy-duty bags that hold more than just Tic Tacs and credit cards. You will instantly up your sartorial game by grabbing one when you head to work -- bonus points if you've scheduled happy hour plans after a day at the office.

Carrie Chapman, senior buyer at Barneys New York told us that, "we've been seeing a lot of the 'urban warrior' trend, and crossbody styles are a big part of that." She added, "They are functional and edgy, and can be very sophisticated."

Make sure to visit Refinery 29 for more styles to choose from. Whether you're a student looking for a stylish alternative to a book bag, or just a gal in need a cross-body purse that you could practically live out of, there's something for everybody.

Meanwhile, you'll never guess whose handbag at the royal wedding is now a best-seller.