- Material: Built with an iron or heavy-duty steel tube frame, usually finished with a matte black or military-green powder coating to resist rust and scratches.
- Fabric: Paired with durable, high-density fabrics such as 600D to 1200D Oxford cloth or heavy canvas.
- Weight & Portability: Significantly heavier than aluminum or wooden versions, typically weighing around 3.5 to 5 kg. They usually feature a simple fold-in-half design rather than the fully detachable breakdown style of the original wood versions.
- Weight Capacity: Exceptionally sturdy, often rated to safely support 120 kg to 150 kg (260–330 lbs) due to the high structural strength of iron.
