There are two sides to every material. Sometimes one can turn to another. For example, water changes from calm to violent when it becomes a whirlpool.
SPIRA portrays the duality within nature by using foam, which has two contrasting textures; soft outside and rough inside. To show its maximum potential, the foam is executed in three steps; it is carved, bent and twisted.
The result resembles a whirlpool and reveals the two sides of foam that mix well with each other, just like yin and yang.