When evaluating an inflatable floating bridge, the most critical factor is the material durability. Look for Double-Wall Fabric (DWF) or Drop-Stitch material with a thickness of at least 15cm to 20cm to ensure high rigidity. The outer layer should be commercial-grade 0.9mm PVC tarpaulin, which provides excellent UV resistance, anti-corrosion properties for saltwater, and puncture resistance. Additionally, ensure the load-bearing capacity is clearly defined (e.g., 200kg to 500kg per square meter) to accommodate the intended number of users safely.