Bungee Cords With Different Materials

 A bungee cord / shock cord is an elastic cord composed of one or more elastic strands forming a core, usually covered in a woven cotton, polypropylene, polyester or nylon sheath

The elastic material of a bungee cord is usually made of natural or synthetic rubber. Natural rubber, sometimes called latex rubber, has excellent extensibility (the ability to be extended), resilience (the ability to regain its original shape after being extended), and tensile strength (the ability to be extended under load without breaking). For these properties, it makes an excellent material for bungee cords.

Bungee cords are most often used to secure objects without tying knots and to absorb shock. Inexpensive bungee cords, with metal or plastic hooks on each end, are marketed as a general utility item.