If you wear bras, chances are you haven't thought too much about their environmental impact. But bras can be made from a variety of unsustainable materials, from water-intensive cotton, to spandex, to petroleum-based polyurethane foam for padding. So once they're tossed, these synthetic fabrics will sit in landfills and take forever to disappear.

It's no wonder Australian lingerie designer Stephanie Devine launched The Very Good Bra, the world's first zero-waste bra.