Prince manufacturers a wide variety of synthetic type strings, from single core to multifilament synthetic guts, as well as pre-packaged hybrids with durable polyester strings. Prince tennis strings appeal to all types of players! Prince Synthetic Gut with Duraflex is the world's most popular synthetic gut and provides a great blend of performance, durability, and value. Prince Recoil is a revolutionary string that realigns itself after each hit, keeping both your stringbed and shots consistent and predictable!