The 4S string was designed to generate the most spin.
Composed of 100% Co-polyester with a square structure.
We recommend a tension between 22 and 25 kg. Maximum tension: 32 kg.
The copolyester material used will generate control and resistance.
The square structure will generate maximum spin, allowing for extremely aggressive trajectories: long, looping shots or short, cross-court shots. The faster the stroke, the more you'll amplify the spin!
The technology for manufacturing monofilament is based on 3 essential points:
The quality of the materials offered depends on the desired benefits.
The Thermocore process. Specially developed by Tecnifibre for manufacturing polyester monofilaments to soften their natural stiffness. This requires a series of heating and cooling stages throughout the stringing process. This exclusive process reduces the polyester's stiffness, making it more comfortable to play with and less likely to cause injury.
The final structure of the string can be round, pentagonal, or even square in order to increase the effects through friction.
A leading brand in strings, Tecnifibre is the supplier of polyester monofilaments to top players worldwide, including Daniil Medvedev and Iga Swiatek. Designed, developed, and produced in France, Tecnifibre monofilament is renowned and appreciated for its trajectory control, spin potential, and flexibility, thanks to its exclusive Thermocore manufacturing process.
Our string factory, established 175 years ago in Wervicq-Sud (Northern France), has integrated a high-end production unit for monofilaments. Since 2008, it has specialized in the production of Co-polyester monofilaments, renowned as the premium version of polyester because they incorporate several types of polyester into a single rope.
The Tecnifibre brand's mission is to unlock the potential of every player by offering products that combine high performance and unique elegance, all developed through the TECNILAB laboratory using the logic: Identify, Quantify, Solve.