From Twisted X, the Women's ecoTWX® Cactus Print Slip-On Loafers feature: Upper is made from ecoTWX® material and fabric for increased breath-ability ecoTWX® is a durable eco-friendly material made from up to 13 recycled water bottles Slip-on construction Removable, moisture-wicking, antibacterial and machine washable SD footbed Dual-density compression molded EVA midsole Slip-resistant molded rubber outsole provides added durability and traction Flat heel Imported. In addition to the positive impact of removing plastic water bottles from the environment, for every pair purchased, Twisted X® will plant a tree and help repopulate troubled tree populations in the United States.