While it looks like a bunch of renderings, this unlikely-looking UFO ("Unidentified Furniture Object") rocking chair is real.

They're made-to-order, in two sizes, by Italian design brand Mavimatt.

"The composition of UFO's inner seat foam is designed to follow and adapt to people's different morphologies. The outer shell, on the other hand, is made entirely by hand, one piece at a time, without the use of industrial processes, to guarantee quality excellence."

"UFO's main structure is made entirely of fibreglass or carbon fibre. [Both] make the body extremely strong and rigid, yet lightweight. The choice of using the best materials on the market and the unparalleled design make the UFO armchair an unrivalled and unique object of desire."

"For UFO's seat upholstery we use Italian primofiore leather or fine fabrics. The UFO seat is very comfortable and gives a unique feeling when you use it. This is due to the special layering of the inner foam made of different densities."

"The armchair shell is also designed with an innovative design and style. Its spherical shell keeps the entire weight for balancing on a single point on the ground. The most incredible feature of the shell design is that most of the armchair remains frictionless on the ground, making UFO a lightweight element that can rotate while remaining perfectly balanced."

There's no standard price, as the cost depends on your choice of materials, colors and finishes. I'm guessing it's an if-you-have-to-ask kind of thing.