A great example of a cellular structure is the honeycomb. It is a strong structure even though it is made up of hollow hexagonal shapes.
Textile fabrics are usually quite flat but certain construction methods can introduce hollow spaces that trap air and make the textile feel and look thicker.
Biology teaches us how cellular structures can help us create three-dimensional materials using hollow space as a component of our design.
The honeycomb is a cellular structure primarily made from wax and little bit of silk for reinforcement (only found in the wild) both produced and deposited by the honeybee.
Wax is an expensive material for a bee, a single gram requires about 26,430 flower visits, as such is used sparingly. The honeycomb is formed of a series of individual hollow cells to store food (honey) and protect their young. This is a extraordinary design in that it requires the least possible amount of material (wax) to provide the largest amount of storage space, with the greatest possible structural stability.