These heavy-duty balloons offer maximum resistance to rupture thanks to the two multiple solid ropes reinforced with brackets. Tested for durability and flexibility at temperatures from -30oC to +50oC, 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 (F-13). They are essential for recreational boats and are widely used in coastal ships, fishing boats, and commercial vessels.