Robotic parts made of soft stretchy materials like silicone rubber or fabric. Usually they use something like pulleys or the inflation of small balloons with fluid or air. The result is kind of biomechanical, pillowy, and round. It can look very organic and animal-like, sometimes even resembling muscles, bones, or fat. It can even have bendy jointless limbs like a rubberhose character or just straight up tentacles. Very futuristic and alien, and, unlike most other robots, very squishy. So whether you're making an extra huggable robot girl, or a new type of monsterous mechanical mayhem machine, this model's got you covered.
