By the looks of it, the Level Shelf appears to be made using an elastic material of some sort. In reality, the Level Shelf uses a continuous piece of canvas acrylic fabric that is looped through the cylinders. Depending on what is placed on each of its three sections, the cloth will dip accordingly. Of course, the most important factor is weight. For instance, a vase full of flowers can't compete with a stack of books.
Designed by Roger Moliné, a product designer based in Barcelona, Spain, the Level Shelf is essentially customizable. It allows users to play with different objects and arrangements in their own personal ways. Not to mention that the design is chic.