The development of a modular exoskeleton for walking assistance, originally meant for children and adults of short stature, began in February 2015 at the Laboratoire de Systèmes Robotiques (LSRO) at EPFL. Only a year and a half later, the technological development of the device is sufficiently operational and secure to carry out the first tests with a test pilot.

TWIICE allows its users to regain autonomy in daily activities: sitting and standing, walking on even and uneven ground, on flat and inclined surfaces. The intention of the designers is also to give (back) its users some of the sensations associated with walking or simply standing.