Synthetic ropes are either very elastic or just the opposite, which means tight. It all depends on the use of the ropes. Some people need ropes to be able to cushion the jump into the depths when bungee jumping. On the other hand, such a highly elastic rubber rope is rather unsuitable for sailing. Other requirements are needed here: tear-resistant anchor lines or handy, abrasion-resistant ropes for setting sails, which should be light and above all buoyant.
To provide something suitable for every outdoor sport, the ropes are made of very different polymers. In addition, some polymer chains are more tightly crosslinked, while others are more wide-meshed. Test for yourself how different ropes can be.