About this product: Upper: Calf Leather Lining: Leather/Textile Lining Insole: (Removable) FLUIDFORM construction PU / TPU dual-layer Color: Navajo Brown Description: A slip-on that combines relaxation and sophistication. Premium suede made in our own tannery is used for the upper. The PU/TPU dual-layer sole uses a unique new manufacturing method that involves hollowing out the soft TPU inner part and injecting lightweight and flexible PU, achieving both lightness and flexibility. ECCO's FLUIDFORM™ (direct injection) sole, which makes it possible to reproduce an anatomical last (wooden mold) based on ergonomics, and high-quality premium leather manufactured in our own tannery provide unparalleled comfort.