What factor contributes to the durability of a yarn's weave?

The factor that contributes to the durability of a yarn's weave is fiber twist. The twist in yarn refers to how tightly the fibers are twisted together, which can significantly enhance the strength and durability of the woven fabric. A higher twist often results in more tightly bound fibers, reducing the likelihood of unraveling or fraying under stress. This cohesive strength is essential for fabrics that need to withstand wear and tear over time.

The length of fibers can influence the smoothness and texture of the fabric but is less critical in terms of overall durability compared to the twist. While color is an important aesthetic aspect of textiles, it does not affect the mechanical properties of the yarn and thus does not play a role in durability. The weight of the fabric relates to its thickness and density but does not inherently improve the strength of the yarn’s weave. Therefore, fiber twist is the key factor that enhances the longevity and durability of a yarn's fabric.