Strings (tennis) - Composition - Polyester

Polyester

Polyester is a stiff and durable string material, originally intended for use by frequent string breakers. It took the string time to become popular, primarily due to its poor tension holding capability. However, players feel they are able to apply more topspin to balls while maintaining control with polyester strings. Polyester's support for heavy topspin in particular has made it the most popular material in the pro tour. The increased topspin due to polyester strings has been verified with controlled experiments. The exact cause for the increased spin is not known but there is strong evidence that the low friction between strings is a factor.

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