The Trionic Walker and the Trionic Veloped are both outdoor rollators. The main difference is that the Veloped is more off-road capable and it has a climbing wheel at the front. The Veloped is like a tripod with 3 wheels in contact with the ground so it can better negotiate off-road conditions with obstacles. The Walker is a conventional rollator configuration with 4 wheels in contact with the ground but the Walker 14er (14 inch wheel) can actually go very well on grass, gravel, farmland and even beaches. Both are suitable for an urban or country environment but usability depends on user ability and terrain.