Strings

Expert Guide to ReString Vivo and HEAD Hawk Tour rPET

October 10, 2025 Juan

ReString Vivo and HEAD Hawk Tour rPET are both control and spin-oriented, shaped polyester strings made from sustainable recycled materials.

We’re going to break down the performance of both strings, give our expert opinion on both and help you choose the right sustainable string for your game.

In short, we believe Vivo offers better control, spin and durability, while Hawk Tour rPET edges Vivo on power and plays a bit softer.

Performance Comparison

Feature	ReString Vivo	HEAD Hawk Tour rPET
Control	Tour-level control and precision	Great control and precision
Spin	Higher spin from hexagonal shape	Lower spin from heptagonal shape
Power	Generate your own pace	More power assistance
Feel	Firmer, more direct feedback	Softer, more dampened response
Durability	Best-in-class tension holding	Good durability with modern coating
Sustainability	Made from recycled polyester	Made from recycled polyester
Price	$16 single set	$16 single set

Note: The 100/100 tension holding rating for Vivo on Racketpedia is completely unheard of for recycled polyester strings. This gives you extended playability without frequent restringing.

ReString Vivo Overview

Vivo is made from recycled polyester with a hexagonal shaped profile. The six-sided cross section delivers exceptional bite and grip on the ball.

Excellent spin potential comes from the shaped profile creating dipping spin and sharp angles. You can hit aggressive shots with confidence knowing the ball will drop into the court.

Leading control comes through the honest stringbed response. The string tells you exactly what's happening at contact without sugar coating your mistakes.

Best-in-class tension maintenance lasts weeks according to Tennisnerd's testing. He compared Vivo’s durability favorably to Solinco Hyper-G and Head Lynx Tour.

Vivo has a firmer feel and requires you to generate your own power. However, the upside of this is that you get a really connected feel with your stringbed.

HEAD Hawk Tour rPET Overview

HEAD Hawk Tour rPET is made from recycled polyester with a seven-sided profile. The heptagonal shape provides a different approach to sustainable performance.

The string is designed for high-level spin due to bite from the shaped sides. Seven edges grip the ball throughout contact to generate rotation.

Good control helps you get a predictable response from your racket. The string behaves consistently across different swing speeds and contact points.

Strong tension stability keeps the string playing well over multiple sessions. Again, this is less than Vivo’s best-in-class tension holding but still better than a lot of other polyesters due to modern coating technology.

Hawk Tour rPET has a softer feel than Vivo and offers more power assistance at the expense of direct feedback from the stringbed.

Which String Should You Choose?

Choose Vivo if you want tour-level control and spin, firm feedback and best-in-class durability in a sustainable package.

Choose Hawk Tour rPET if you want good control and spin potential, soft feedback and power assistance in a sustainable package.

However, if power is your priority, neither string is best for your game. Consider Zero, which is built for maximum power and spin.

Conclusion

Its fair to say that ReString Vivo and Head Hawk Tour rPET are quite similar to each other and both prove recycled materials can deliver high-level performance without compromise.

As a purpose-driven brand, we’re delighted that other string manufacturers are innovating with recycled materials to make tennis more sustainable.

To finish, here's a review from one player on Talk Tennis who tested Vivo extensively. "I am officially blown away by Vivo 1.28. One of the best if not the best shaped string I’ve ever tested…"

About the Author: Juan is the co-founder of ReString. He was born in Argentina, raised in Japan, and moved to the US to pursue college tennis. He now plays as an ATP & WTA hitting partner.