Práctica collects the recent work of Sara González de Ubieta (Madrid, 1982), one of las m innovative artisans and shoe designers in the country. This publication places special emphasis on las research he has carried out in recent years, in which he has delved into the search for alternatives to leather and pattern making in footwear, focusing on the use of waste materials, specifically fibers that can be felted, and on 'living' materials, Like the Scoby mushroom, las ra