Gel-Nimbus 27 Men's Rival Pro Penn Marathon is Penn۪s

Pro Penn Marathon is Penn۪s longest lasting tennis ball featuring exclusive Encore Technology for a 22% longer lasting core and high tenacity LongPlay Felt for extended play

resilient co-polymer fluorocarbon resin fibers

Designed for durability and superior heat dissipation

Aerohead II Mips® is our most aerodynamic time trial helmet ever

Gel-Nimbus 27 Men's Rival Pro Penn Marathon is Penn۪sThe GEL NIMBUS 27 shoes soft cushioning properties help you feel like youre landing on clouds. This design is revamped with new materials that create a softer and smoother running experience. A soft engineered knit upper comfortably wraps your foot while supplying advanced ventilation. Additionally, the knit collar and midfoot fit help provide a comfortable feel. The midsole is packed with the most cushioning that the series has offered to date. By