The Roof Airbag ecosystem comprises a defined upstream‑midstream‑downstream flow that translates raw inputs into safety‑critical vehicle systems. Upstream, raw‑material and component suppliers provide high‑strength fabrics, inflators, sensors, and electronic controllers. Technology providers convert these inputs into software algorithms, diagnostic tools, and system‑level designs. Midstream, OEM manufacturers assemble the components into complete roof‑airbag modules and system integrators embed them within vehicle structural and electronic architectures. Downstream, distributors and channel partners deliver finished modules to original equipment manufacturers, aftermarket converters, and fleet operators, while service providers handle installation, testing, and warranty support. Value is captured through design licensing, module sales, integration services, and after‑sales contracts, with each tier extracting margin based on technical contribution and risk assumption.