Exoskeletons don't come cheap and they're not one size fits all, making them a daunting prospect for the average buyer. But, some companies are working towards changing that. In December, Hyundai promised to make the suits cheaper. And, researchers are using machine learning to make them more accessible for people with mobility issues. That's where Bionik Laboratories comes in. The startup is adding Amazon's Alexa to its Arke lower-body exoskeleton, allowing wearers to control it with their voice. The exoskeleton is mainly aimed at those who have suffered spinal injuries. Although, its lower-body support mechanism could also aid stroke and traumatic brain injury victims, claims the company.