When evaluating walking sandals, prioritize the Outsole Material, typically slip-resistant rubber or TPU with a multi-directional lug pattern for traction. The Midsole should feature EVA (Ethylene Vinyl Acetate) or PU (Polyurethane) for shock absorption and long-term cushioning. For the Upper Material, look for quick-drying synthetic webbing or breathable genuine leather depending on the target market. Additionally, ensure the Arch Support is ergonomically designed to prevent plantar fasciitis during long-distance walking.