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 high quality leather that has been tanned with natural oils and waxes, getting that special shine. LINING : Breathable. Highly breathable and resistant fabric.