I've been carrying them for 13 months under a very heavy tarp which has given them a good load in hot, sunny and windy weather. When new, they stretch from 8" to about 14". Over a year later they are 9 inches tall and have been stretched to 16 inches, but they still appear to be very durable. Based on how they look and feel I would say they will last me another 1-2 years which is amazing. I also had some Kotap cords on the same tarp and although they were 11 inches long they lost their elasticity and were ready to snap after 13 months.
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