Admit it: You have really old jeans that you don't need anymore. They're crammed into your drawers and taking up much-needed space. So Madewell is giving you an incentive to donate those old jeans! When you bring pre-worn jeans to a Madewell store, they'll recycle them and give you $20 toward a new pair! What do they do with your old jeans? This is the cool part. They work with Blue Jeans Go Green to turn the old denim into housing insulation! So not only do you get money off a new pair of denim, you're also doing good in the process. Win win!