Prince Hybrid Power is a pre-packaged hybrid of Prince Prince Poly EXP 17. Premier LT offers ultimate feel and comfort in the Prince string line. Utilizing advanced linear multifilament technology, string microfibers are aligned in parallel to pocket/cup the ball providing exceptional comfort, power, and playability. Poly EXP 17 offers incredible durability with more comfort than previous polys in the Prince string line. Delivers crisp feel with surprising power and the durability expected from a polyester string.