Wilson Trinity Pro 24 Recycled Paper Containers Tennis Balls : The Wilson Trinity Pro 24 Recycled Paper Containers serves up the speed and sustainability for competitive players who bring the heat. Crafted with a premium woven felt for consistent flight and bounce characteristics, this tennis ball delivers results for aggressive strokes. It features a signature fresh ball feel thanks to its Engage Core, an innovative new elastomer material that maintains its fresh ball feel four times longer than standard tennis ball cores. The Wilson Trinity Pro 24 Recycled Paper Containers is packaged in fully recyclable octagonal sleeves, delivering eco-friendly innovation to the tennis ball industry. Recyclable, sustainably sourced packaging Hi-Vis pro woven felt provides superior consistency and easier tracking Construction optimized for lively and responsive properties upon contact with string bed Engage Core integrates innovative elastomer material that maintains fresh ball feel 4x longer than a standard core Sleeve includes 3 balls; pack includes 24 sleeves