When evaluating walking aids (walkers, rollators, or canes), prioritize load-bearing capacity, which should typically be at least 100kg to 150kg for standard models and higher for bariatric versions. The frame material is critical; anodized aluminum alloy is preferred for its lightweight yet high-strength properties and corrosion resistance. For rollators, ensure the braking system is responsive and includes a parking brake feature for user safety when seated. Additionally, height adjustability with secure locking mechanisms is essential to accommodate different user statures.