String Project Armour
Plush on impact, precise off the strings.
Discover ArmourTennis strings · String Project
Improve your tennis
The right string changes your game. We develop and test Arm Friendly® tennis strings to give you control, spin and comfort — with no compromise on performance.
Arm Friendly®Comfort and protection for the arm
Laboratory testedPro-t-one ratings (Eng. Medri)
One tree per productTogether with Tree-Nation
Free shipping to ItalyOver €50 — €12.90 to other destinations
Find the right string for you
Every game has its string. Start from what you're looking for on court and discover the models best suited to your style.
Control & precision
For those who build the point and want to direct every shot.
Our tennis strings
Eight strings, one goal: to make you play better. All Arm Friendly®, all laboratory-tested.
String Project Keen
Thin, sensitive, responsive: feel every shot.
Discover Keen
String Project Sirius
Precise, stable, consistent: top-level performance.
Discover Sirius
String Project Armour Soft
Balanced in every way, consistent over time.
Discover Armour Soft
String Project Magic
The comfort of a multi with the performance of a mono.
Discover Magic
String Project Gold
Comfortable and stable: the evolved multifilament.
Discover GoldReviewed by experts
Independent reviews published by testers and specialist tennis outlets.
ProStrungprostrung.com
TennisNerdtennisnerd.net
Tennis Italianotennisitaliano.it
Fabio Ferrofabioferro.blog
Our commitment
Two environmental initiatives we support through partners, with verifiable data.
One product is a new tree in the world
For every product sold we fund the planting of a tree through Tree-Nation: the String Project forest can be viewed on the project's public profile.
Plastic recycling and recovery
Plastic pollution is one of the most serious environmental threats. With Plastiks.io we fund plastic recovery and recycling in projects around the world.
Ready to improve your game?
Choose the string that suits your style and feel the difference from the first rally. Free shipping to Italy over €50.