Big Hitter Rough is an exclusive German mono-filament crafted into a pentagonal shaped string and then twisted. The pentagonal shape bites the ball for ultimate spin while still offering outstanding durability, control, and comfort.
German technology refined the popular polyester string and made it very soft with poly-poly ether material. This exotic material makes the string more playable while keeping its durability. Big Hitter Rough is truly a superbly engineered string.