What is a disadvantage of synthetic rope (nylon or polypropylene)?

The disadvantage of synthetic rope, such as nylon or polypropylene, lying in its tendency to stretch while under tension is significant in various applications. This stretching can affect the rope's performance in critical situations, such as in lifting or tying loads where stability and control are essential. Unlike some natural fibers, synthetic ropes typically exhibit noticeable elasticity, which can lead to a loss of precision during operations. This characteristic can also contribute to shock loading, potentially resulting in failure or accidents if the rope's elasticity is exceeded.

Other options address different concerns. The expense of synthetic ropes can vary, but they are often considered cost-effective over time due to their durability. Comparing synthetic ropes to manila ropes, they typically offer better strength-to-weight ratios despite being perceived as weaker in some contexts. Additionally, while some synthetic materials may degrade when exposed to prolonged moisture, many synthetic ropes, particularly nylon, are designed to perform well even in wet conditions. The focus on the tendency to stretch under tension distinguishes this particular disadvantage from the others.