The knotweed material is made from Japanese knotweed cut offs originating from Rotterdam. The material is strong yet light and comes in different visual styles. Depending on the season of harvest and the treatment of the stems.

When the material has served its purpose as a design piece, Why Knot will re-use the material in new items, leaving little to no waste. When it can not be reused any more, it can safely biodegrade in the ground to enrich the soil. There is no growing strength left, which means the Japanese Knotweed can not sprout again.

The material is in the development stage. The nexts steps are to make the material even stronger and suitable for varying indoor environments and purposes.