"We asked ourselves, what do users want and then looked for the materials and design concepts that can deliver that," says Knopow. "We borrowed a lot from the automotive industry," he adds, "and used ABS on the outside of the walker and ABS with a leather-like texture on the inside. It needed to look nice, but it also had to be as light or lighter than current walkers, which typically weigh around 15 pounds. The material and monocoque design helped us to achieve the aesthetic and structural integrity and weight that we wanted," says Knopow. He and his partner have applied for a patent on hollow-plastic walker technology."