Researchers at Stanford University, in collaboration with the Massachusetts Institute of Technology, have developed a new soft robotic arm. It uses air pockets to create a more realistic sense of touch in virtual reality (VR). Unlike existing haptic feedback systems that rely on vibrations from motorized actuators, Haptiknit uses pouches that can selectively inflate and deflate, creating pressure on the skin. This allows different sensations, such as tapping or stroking, to be simulated without the need for bulky exoskeletons. The prototype sleeve includes 8 pneumatic actuators arranged in 2 rows. Each bag is individually controlled by a thin hose and a battery operated pump worn on the user's arm. The main part of the hose is made of nylon and cotton fibers, and thermoplastic material is used where the actuators are placed. Once heated, they harden to form rigid pouch housings. Thirty-two volunteers took part in the trials. The Haptiknit system demonstrated its effectiveness. With it, participants were better at locating virtual taps on their arm compared to traditional motorized systems. The sleeve was also successful in creating the sensation of virtual stroking by activating the pouches sequentially. For now, this is only a prototype. According to the authors of the project, the technology may find applications beyond VR in the future