A static rope, by definition, will not stretch. It may lengthen if being everloaded, but under normal conditions there is no stretch.

All rope stretches because it consists of materials at an angle to the load putting tension on the rope, and they try to straighten when pulled. How much the rope can stretch, and at what point the stretch weakens the rope, depends upon the materials used and the rope construction - laid up or braid, and the combinations of these.

Dynamic climbing rope stretches when it is loaded, so for a climber this means that when he falls, the rope will stretch a little as weight is applied, making a fall softer and safer.

A static climbing rope does not stretch and has its advantages in situations where you need a rope that does not stretch or give, such as rappelling or caving use. A static rope should not be used by climbers who are lead climbing because taking a fall on a static rope can lead to serious injury to the climber or even cause the rope to snap as it does not properly absorb the force it needs to cushion a fall.

The difference between nylon and dacron rope is that nylon stretch but dacron dose not!

The braided rope is better because it is made from nylon or polyester. It can hold heavier weights than a regular rope. It can stretch and some polyesters are waterproof.