Durable and highly elastic rubber cord. Strong against washing and long-lasting. Excellent elasticity, strength, and durability! Brand new, unused. I bought it around this spring, but I'm selling it because I no longer need it. Size: 11mm, 12-wale (for training pants, skirts) Material: Thread: 100% polyester Rubber: Natural rubber (Nitron) Weaving ratio: Rubber 40%, Thread 60% Elongation: 250% Specification: 30m roll Passed PPM test With cord threader, made in Japan