Rubber can be natural or synthetic, but in any case, rubber is very elastic. Natural rubber is originally derived from latex ( latex is Rubber tree product ). Products which are usually made of rubber are rubber, belts, gloves,....
Sometimes in textile industry they call rubber elastic, because of incredible elastic properties ( but it also quickly shrinks back to its original state ).
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Neoprene or polychloroprene belongs to a group of synthetically produced rubber obtained by polymerizing chloroprene. Neoprene is highly resistant and is useful over a wide temperature range.