Head Extreme MP 2026 Tennis Signum Pro Firestorm is a

Signum Pro Firestorm is a high-tech co-polyester string which offers maximum durability

A polyurethane elastomer resin coating provides easier stringing and increased durability

Signum Pro Plasma HEXtreme retains all the excellent characteristics Poly Plasma offers

Try this thin version for maximum spin

Head Extreme MP 2026 Tennis Signum Pro Firestorm is aThe Extreme MP 2026 pairs power, spin, and control for intermediate and advanced players ready to push their game further. Hy Bor in the shaft adds a solid, stable feel at impact, while Auxetic 2. 0 sharpens ball contact feedback. The 16x19 pattern with Spin Grommets generates heavy topspin on every shot, and the 300g frame balances pace with maneuverability. It's built for players who want to add spin and power without losing control.