Tennis Warehouse review: Signum Pro’s X-Perience string is built for players who want more control on their biggest swings. Although it is made from a stiff polyester base materal, Signum Pro has injected special additives to improve comfort, power and feel. The result is a control string with great feel. X-Perience is also shaped, giving it a sharp bite and massive spin potential. With its higher comfort level, x-perience is an obvious choice for the big hitter who wants some extra spin and comfort.
https://www.tennis-warehouse.com/Signum_Pro_X-Perience_17_124_String/descpageACSIGNUM-SIGX17.html
I now stock this string in 1.30 (16g) It’s bright green in colour and looks great. A Co-Poly that does not feel too stiff. I use this string currently and have been impressed with it. Plays well as a full bed or as a hybrid. I hybrid with a Synthetic gut to protect my elbow.