Already a pro at thrifting, swapping, and upcycling eco-fashions? Then check out these new stylish ideas, dreamed up by green thinkers who like to stay in fashion while treading lightly on the planet!

Denim Therapy. To-be-mamas don’t have to stow away their favorite pair of organic jeans. Send them to Denim Therapy, and for $60, the eco-DIY-ers there will sew in “expandable side inseams to move and grow with you.” Once you have the baby and snap back to your pre-pregnancy size, you can send those revamped jeans to Denim Therapy once again—and the company will de-biggify your jeans for the new (or old?) smaller you.

thredUP. Love the convenience of Netflix and Chegg? thredUp offers something similar—except there’s an element of surprise involved. Sign up for the beta site (first 50 people can use the code “greenLAgirl”; latecomers will have to wait for the official launch) and you can start swapping pre-loved fashions with fellow eco-fashionistas who share your size and sense of style. Since no one will be uploading pictures, what you get will hopefully be a welcome stylish surprise!

A Box Life. Are you a BookCrossing fan who loves to share books and track its journey from reader to reader? A Box Life’s like BookCrossing—except for, you know, boxes. Companies like Columbia Sportswear are giving customers the option of getting their purchases delivered in a reused box—that they can track via A Box Life so boxers can share the story of where the box is been and will be going.

Photo via Denim Therapy