Black Vinyl Coated Polyester side and bottom tapes with two rows of stitching

Considered a workhorse machine

it also helps promote flexibility

High resistance to movement

Breathable mesh fabric in back for a soft

Wilson Grand Slam Extra Duty 24 Cans Ball Type_Intermediate Black Vinyl Coated Polyester sideWhen you're planning a long day on the court, choose a ball that outlasts the competition. Wilson Grand Slam Extra Duty tennis balls use an all court felt for play on any surface. Regardless of your playing level, Wilson Grand Slam Extra Duty tennis balls provide the longevity to survive your toughest matches and longest rallies. Ideal for all court surfaces Equipped with an all court felt for consistency and durability.