Which of these product innovations had the most significant impact on competitive performance in its sport when first introduced?

The sports equipment industry has seen numerous breakthrough innovations that have transformed how athletes perform. From advanced materials to technological integrations, these products have pushed the boundaries of what's possible in athletic achievement. This trivia question focuses on a pivotal product innovation that dramatically changed a popular sport. Test your knowledge about sports product history and see if you can identify which revolutionary product truly transformed its sport!

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The carbon fiber tennis racket, introduced by Dunlop in 1980
The polyurethane-covered basketball, adopted by the NBA in 1970
The full-body LZR Racer swimsuit by Speedo, which led to 98% of swimming medals at the 2008 Olympics going to athletes wearing it
The titanium driver head in golf, first mass-marketed by Callaway in 1995