What they are:
Superflex is a steel cable of plaited configuration, not laid or twisted like wire rope. The interplaiting of the sets of strands creates a very tough and set-resistant cable composed of many more wires than is possible with a laid wire rope. Superflex comprises 912 individual wires in its cross section. This makes for a cable of great flexibility and yet is still tough and practical for general use.

What they do:
Superflex cable is used to make slings for general lifting operations where flexibility and ease of handling are seen as important.

Why are they used:
It is a practical and heavy duty cable with great flexibility, which provides without loosing too much in heavy duty toughness and durability.