"When customers are ready to retire a pair of well-worn Okabashis, they can mail their shoes back to the company’s Buford, Ga. factory and receive a coupon for their next purchase. Okabashi’s team cleans the old shoes, grinds them down and blends the recycled plastic pieces with new plastic. The workers then remold the plastic mixture to produce a new pair of sandals, achieving a closed-loop recycling process." (Quoted from article)