The Ekso Bionics exoskeleton has undergone frequent changes since its first version, the Defense Department-funded HULC, or human load universal carrier. Ekso's bionic suit, which includes a new 3D printed version for custom fit, can now assist anyone with lower-extremity mobility issues stemming from spinal cord injuries or strokes. The device is built primarily from aluminum, but when volumes increase, economies of scale may make injection plastic molding a cost-effective alternative, according to Russ Angold, Ekso co-founder.

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