"Sam makes a good point - it does seem like the product is hard to dispose of responsibly later. I like much more Adidas Parley and Ecoalf brand's model as the model for repurposing plastic into sustainable products - they remove the ocean plastic and make trainers out of them.Also, leather is quite sustainable :) You can get some sustainable fashion shoes from independent brands here: https://www.newdresscode.com/womens-sustainable-fashion/shoes"