Fabric upper; Nylon laces. Also features elastic gore panels on the tongue that allow the shoe to be worn without laces; ecoTWEED Lining. ecoTWEED material is made from recycled plastic bottles; Blend85 footbeds are made with 85% recycled foam; Footbeds also feature ecoTWEED Lining. ecoTWEED material is made from recycled plastic bottles; Rubber cupsole integrated with blended rice husk. Blended rice husk is an agricultural by-product that is typically thrown away