A new, limited-edition recycled denim collection, arriving just in time for the Earth Day fuss, has united Alexander Wang, Bottega Veneta, Derek Lam, Rodarte, Rogan, Stella McCartney, Versace, and Ann Demeulemeester.

Last summer Barney’s New York collected recycled denim, which these top designers have fashioned into outfits. The exclusive designs, now in a window display at Barney’s, will go up for auction on eBay April 30, starting at 99 cents each.  All proceeds will benefit Oceana, “the largest international advocacy organization focused 100 percent on protecting and restoring the world’s oceans.”

ELLE has even chipped in with a David Armstrong-shot editorial in their May 2009 issue.

Project Blue is working on the stat that less than 2% of clothing thrown out in the US is actually worn out. Alternatives, of course, include buying and giving away used clothes, or re-fashioning and re-purposing old clothing, as these featured designers have done.

GALLERY: ELLE Lookbook.