What feature is commonly designed in walkers to aid mobility?

Adjustable height is a commonly designed feature in walkers to aid mobility because it allows users to customize the walker to their specific height and needs. This adjustability helps ensure that the user maintains proper posture and biomechanics while using the walker, promoting safety and comfort. An appropriate height setting minimizes strain on the back and arms, enabling better mobility and ease of use.

While other features such as a non-slip surface and portable wheels can enhance a walker's functionality, it is the adjustable height that directly impacts the user's experience by providing a tailored fit. This essential feature helps users navigate their environment more effectively and reduces the risk of falls or discomfort during movement.