The Perfect Bungee products are a unique solid core bungee cord produced from a FlexipureTM rubber compound. The stretch in the cord has a perfect memory which does not diminish with use. Perfect Bungee cords can safely stretch much further than a standard braided bungee cord. The FlexipureTM compound is extremely durable and will not lose strength over time. These really are "The Perfect Bungee"!