Bungee cord

A bungee cord (also spelled bungie or bungy; sometimes called a shock cord or occy strap) is a stretchable cord made of one or more rubber strands inside a woven cotton or polypropylene cover. When the cord is stretched, the cover tightens around the core, allowing it to extend and return to its original length. Some versions, such as those used in bungee jumping, are made entirely of elastic strands. Bungee cords are often used to fasten or secure objects and to absorb shock.

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