Don’t consign your moldy old gym shoes to the landfill (or worse, chuck them in some unsuspecting charity’s donation bin). With OAT’s fully biodegradable sneakers, you can plant them in your backyard to produce a patch of wildflowers. The two-year-old Dutch label accomplishes this with its innovative materials: soft, breathable canvas and flexible seed-embedded cork soles that literally go to pot when you bury them. Your loss is Ma Nature’s gain.