Solid Core Synthetics.
Lightning XX string has spring-loaded Powerfoil which releases explosive energy on impact for greater power, while providing a broadband wear barrier for increased durability.
Lasts 50% longer than duraflex but plays 10% livelier. Solid core with outerwraps.
Structure-wise, Prince Lightning is actually a pretty similar string to Prince Synthetic Gut with Duraflex. The key difference is the inclusion of Powerfoil™ to increase power and durability. Lightning XX is available in plenty of color options so you can customize to your heart's content.
When you purchase this pink string, Prince makes a donation to The Breast Cancer Research Foundation.