Nylon (PA)

Nylon (polyamide) cords are a strong choice. They are abrasion resistant and durable. Core-mantel structured nylon cords have really high breaking strengths.
Nylon cords have few percentages of stretch. Nylon fiber absorbs some water and thus cord length varies a little according to surrounding humidity. Also the fiber strength lowers slightly in very dry conditions of extremely low and high temperatures. Nylon fiber is slightly sensitive to UV radiation but usually sunlight doesn't cause damage to protected core-mantel cords.