When selecting a balloon blimp, the material composition is paramount. For indoor use, 0.18mm PVC is standard, while outdoor blimps require 0.2mm to 0.35mm PVC or TPU for enhanced UV resistance and durability. Ensure the lifting capacity is calculated correctly; for example, a 6-meter blimp typically requires approximately 15-18 cubic meters of Helium to achieve stable flight. Additionally, verify that the seam welding uses high-frequency technology to prevent gas leakage, ensuring the blimp remains inflated for 5-7 days before needing a top-off.