Which property of synthetic fabrics makes them preferable for aircraft covering?

Synthetic fabrics are preferred for aircraft covering primarily because of their superior moisture resistance. This characteristic is crucial in aviation, as moisture can lead to various issues such as mold growth, structural integrity problems, and weight increase due to water absorption. The ability of synthetic materials to repel water prevents these detrimental effects, ensuring that the aircraft remains lightweight, strong, and safe.

While heavier weight could add durability, it is not advantageous for the performance of an aircraft. Bright colors, although pleasing aesthetically, do not impact the functional aspects of fabric covering. Biodegradability is not a desirable trait for aircraft coverings, as durability and long-term performance are necessary for safety and maintenance. This makes moisture resistance the standout property that aligns with the needs of aircraft covering materials.