Strings (tennis)
The material used in tennis string can significantly affect a player's performance, and even health. Several materials are used to make tennis strings. They vary in terms of elasticity, durability, rebound efficiency, tension holding capability, and manufacturing cost, among other considerations.
Jascha Heifetz
Heifetz was very particular about his choice of strings. He used a silver wound Tricolore gut G string, plain gut unvarnished D and A strings, and a Goldbrokat steel E string medium including clear Hill brand rosin sparingly. Heifetz believed that playing on gut strings was important in rendering an individual sound.