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