The vest isn't powered. Rather, its goal is to absorb some of the force exerted on the wearer and transmit it to the ground (instead of the person's body).
A few months ago, I built a rudimentary unpowered exoskeleton similar to the Ekso models, and it did help with carrying heavy loads once I got past the initial awkwardness of wearing it.
A few months ago, I built a rudimentary unpowered exoskeleton similar to the Ekso models, and it did help with carrying heavy loads once I got past the initial awkwardness of wearing it.