Wilson brings something new to the ball market with Triniti, the first performance tennis ball designed with fully sustainable packaging. While there will not be the familiar "pop" sound as a traditional ball can, the unique octagonal container, called a sleeve, is 100% recyclable after use. The ball features an Engage Core which integrates plastomer material to maintain a fresher feel four times longer than a standard core. STR felt is 50% more flexible than standard felt for better feel and durability. A better ball for the planet.