Rare Ratio Sustainable Running Shoes in Pink. Size 8.5.Ratio is a new running shoe brand from industry veteran Stuart Jenkins. He prioritizes sustainability, circularity of recycling waste materials, and performance. He is also the developer of the new Blumaka insole.Ratio has not been officially launched, only have been sold at 3 retailers.The Ratio shoe comes equipped with a midsole that will protect your body 5-6 times longer then shoes made from EVA or superficial foam. Some dirt spots that I tried removing as pictured.