Monofilament tennis strings
String Project monofilament strings offer control, spin and durability: the choice for those seeking precision and bite on the ball. Latest-generation polyester construction, Arm Friendly® and laboratory-tested.
Seven monofilament models, from the most control-oriented to the explosive in power and spin. Find the right one for your game.
Our monofilaments
Seven monofilament strings, each with its own character. All Arm Friendly®, all laboratory-tested.
String Project Keen
A concentrate of technology, solid and responsive.
Discover Keen
String Project Hexa Pro
Designed to support the most complex spin.
Discover Hexa Pro
String Project Sirius
An unbeatable experience and top-level performance.
Discover Sirius
String Project Armour Soft
Modern and technological, designed for high performance.
Discover Armour Soft
String Project Magic
The comfort of a multi with the performance of a mono.
Discover MagicReady to improve your game?
Choose the string that suits your style and feel the difference. Free shipping from €50.