Crafted in calf suede, with polyester made from at least 50% recycled plastic as part of our FIFTY concept. the backing material of the sneaker consists of at least 50% recycled polyester from PET bottles. The firm heel cap ensures stability and keeps the shoe firmly in place. The removable insole of naturally shock-absorbing cork provides a heathy environment for your feet. Midsole of ultra-soft PU. The Natural soft midsole is made from dual-density PU, which ensures an ultra-soft walking experience. The outsole is made from minimum 10% recycled rubber mixed with ordinary rubber and natural rubber.