From the wonderful Guts and Glory Tennis website
The MSV Hepta-Twist from Mauve Sports sets high standards for poly-based string performance. This is a “must-try” product for all players seeking to enhance their on court game. You have to experience it for yourself to appreciate the benefits of the twist technology.
MSV has taken the best-selling and award winning Focus – Hex ™ and made it even more lethal for your opponents. To accomplish this they used the same base formula as the popular Focus Hex™ and extruded it using a heptagonal (7 sided) die cast. They then used the magic of the new twist technology to create an exciting poly-based string that offers outstanding power, control, comfort and mind-blowing spin!
Construction: New Generation Poly-Based string extruded in heptagonal form and twisted for added spin.
Advantage: This poly-based string offers the highest amount of control and spin potential on the market today. Add to this improved tension maintenance and the popular playing characteristics of the famous MSV Focus Hex™ and you have a product that will help you overwhelm your opponents. Compare it to other poly-based strings on the market today and we are confident you will find it superior in terms of overall traditional poly-based performance.