Heavy-duty balloons from the F-13 series offer maximum burst resistance thanks to the two multiple solid ropes reinforced with arms. These balloons have been tested for strength and flexibility in temperatures ranging from -30°C to +50°C. They feature high abrasion resistance and high energy absorption (up to 3.8 tons for F-13), making them suitable for vessels up to 1500 tons.

They are essential for recreational boats and are widely used by ferry boats, fishing vessels, and .