The stackable Cala chair pays homage to the architecture of Spaniard Santiago Calatrava. Its distinctive design is defined by a lattice-like structure that not only creates a certain degree of transparency, but also allows for easy assembly by slotting together the seat and backrest without the need for screws. Recycled polypropylene is used to manufacture the individual components in an injection moulding process. The comfortable piece of seating furniture is suitable for use in offices and public spaces.