What is a key characteristic of fiberglass as a fabric type for aircraft?

Fiberglass is renowned for its resistance to moisture, which is crucial in aviation where aircraft are frequently exposed to various weather conditions. This characteristic helps prevent issues such as rot and degradation that can occur with other materials when exposed to water. Additionally, fiberglass does not absorb moisture, making it an excellent choice for aircraft applications where moisture resistance is vital for maintaining structural integrity and overall performance.

While options such as low weight, flexibility, and cost-effectiveness can also be considered advantages of fiberglass, they do not specifically highlight the most critical aspect of its application in aircraft construction. In contrast, moisture resistance directly addresses the challenges faced by composite materials in aviation, making it a defining characteristic of fiberglass in this context.