ADAPTACTION TECHNOLOGY: It adapts to your feet and to the 5-8mm width increase they experience during walking ADAPTLITE: XL extralight, very lightweight and flexible material that provides cushioning. INSOLE: Shoe with removable insole. LEATHER: Made of soft Nobuck leather which provides great adaptability. SPRAY: For its care we recommend the Callaghan Water repellent Spray. LINING: Highly breathable and resistant fabric.