Light, adaptable, and distributed power sources are essential for materializing various wearable devices and popularizing Internet-of-Things (IoT) applications. While triboelectric nanogenerators (TENGs) represent a promising solution of wearable energy, many existing fabric-based TENGs (f-TENGs) face challenges in terms of weight, environmental adaptability, and scalable manufacturing. Here, we report a unitary, waterproof, and industrially compatible f-TENG that efficiently harvests energy from diverse natural and biomechanical sources, including rain, wind, and human motion, while functioning as a self-powered sensor and human–machine interface. The f-TENG incorporates sueding-treated polyethylene and nylon fabrics with spray-coated silicone rubber particles to enhance charge transfer, alongside a porous polyurethane spacer that optimizes compressibility and contact–separation efficiency. This design reduces device weight by over 8 times compared to previous systems while achieving higher electrical output (315 V open-circuit voltage and 118 mW/m2 power density). Critically, all fabrication processes align with standard industrial textile manufacturing, ensuring scalability and cost-effectiveness. We demonstrate applications in health monitoring, speech recognition, interactive controls, and sports training, providing a new direction for fabricating lightweight and cost-effective multifunctional TENGs, and highlighting the potential of the f-TENG to enable future generations of self-powered e-textiles and sustainable wearable systems.