The “Placentero” chair is designed by the young Argentinean designer Batti. It’s made from eco leather (white, red, or black), the outer sphere plastic surface is a slick cool-grey fibreglass shell. The Placentero aims to mimic the experiences of the human beings have before birth. Placentero chair is only found at PID.Se.
The downside: weighs 70 Pounds (32 Kg)! a little bit more than I expected.