For formal dress shoes, prioritize Full-Grain Leather for durability and breathability, and ensure the construction uses a Goodyear Welt or Blake Stitch for longevity and resoling capability. For athletic or casual shoes, focus on midsole technology such as EVA or PU foam for shock absorption, and outsole grip using thermoplastic rubber (TPR) or vulcanized rubber for slip resistance. Always verify that the size charts align with international standards like US, EU, or UK sizing to prevent high return rates.