ProPenn Marathon Regular Duty Tennis Balls Can

These particular Pro Penn Marathon balls are made of regular duty felt, ideal for soft courts such as: clay, grass, omni and carpet. As part of Penn's longest lasting line of balls, the Pro Penn Marathon is a great choice for the serious tennis player seeking a premium tennis ball. This ball features Penn's Encore technology for more longevity in the core and LongPlay felt for better durability. Optik felt keeps visibility at a maximum.