This a pair of modular trainers are based on the building block principle. The shoes are a home-made prototype, realised with local and compostable materials, without any plastics. For the sole, the designer uses latex extract from the root of the dandelion (natural rubber) and waste materials such as straw or sawdust as fillers and natural dyes. The thin string is made with cellulose felt while the upper with woven hemp. The elements are not glued together, they can be assembled and freely combined: the upper shape wraps the lower part of the sole, in order to hold all the elements together. The shoes are still in development as the designer is optimising the shape and properties of the materials. There is no precise expiration date yet as each item has its own life cycle. The designer tried to include air and organic materials in the manufacturing process to reduce their life.