Chart-topping superstars Macklemore & Ryan Lewis, Bruno Mars, Trey Songz and others have joined forces with Converse to customize the iconic all-white Chuck Taylor sneakers for charity. The newly designed kicks are now up for auction on eBay.

The sneakers were customized as part of the In Their Shoes initiative, which raises money for the National Breast Cancer Foundation.

The timing is perfect considering that October is Breast Cancer Awareness month. In addition, Converse is also celebrating the 90th anniversary of its All-Star collection. So it’s a win-win situation for everyone involved.

Among the big-names contributing their original designs to the initiative are the Black Keys, Red Hot Chili Peppers, Skrillex and Charli XCX.

These one-of-kind kicks are up for auction from until Oct. 29. The highest bidder will get to cop the coolest shoes on earth designed by their favorite artist.

To place your bid on the Converse sneakers, click here.

Check out the custom designed Chucks from Macklemore, Bruno Mars and Trey Songz, respectively, below.