The structural integrity of an umbrella depends heavily on the material of the ribs and shaft. For high-end windproof umbrellas, prioritize fiberglass ribs due to their flexibility and resistance to snapping. For lightweight portable models, aluminum alloys are preferred. Ensure the shaft is made of electroplated steel or reinforced aluminum to prevent corrosion. Always verify the number of ribs (6, 8, 10, or 12); a higher rib count generally offers better structural stability against high winds.