Yes! Uncontaminated cardboard is naturally biodegradable, so this means that our Econoflex shipping boxes are too. The good news is that even cardboard boxes with food and natural oils can be composted in your garden. Recycling your boxes has the added benefit of reusing the pulp and minimizing the need to cut down more trees.               While we always recommend that you recycle your boxes, be assured that they'll break down over time no matter what bin you put them in.