The world's most popular clothing item could also be the most eco-friendly. That's right, blue-jeans are going green--or at least that the hope of one Brazilian manufacturer.

The Rio based company, Tristar , recently revealed their new line of environmentally conscious jeans. Not only are the jeans made entirely of organic cotton, the way they're cleaned is also a friendly nod to nature. Instead of using a wasteful washing-machine to clean these jeans, all you have to do is toss them in the freezer.

All it takes to kill the bacteria is 24 hours in the freezer, owner Jandira Barone told the Jornal A Tribuna. When it's pointed out that freezing the jeans will do little to remove stains, Barone is quick to point out that this look is in fashion

"Don't consumers buy pants frayed, ripped, and stained? The concept is the same, only it will be a detail produced by the wearer."

If the jeans do get stained or are particularly dirty, they can be washed with more conventional techniques.

But in addition to the unorthodox method of freezing, the jeans are completely reversible, which Barone believes will extend the time between cleanings.

The company is careful to be as sustainable in its production as the jeans they are producing. All the cotton is organically grown in Brazil on a plantation that uses no water or pesticides.

Despite efforts put into making their jeans sustainable, the company believes that fashion and comfort will be their selling-point. "The result is a beautiful piece, and totally comfortable," Barone said. She mentioned that the repeated thawing of the frozen jeans helps soften the fibers and become more form-fitting.

When the jeans become available, they are expected to run around AUSD$150 a pair--which is a small price to pay for the what might be the world's greenest jeans.