Arm Friendly®

String Project Armour Soft

Balanced in every way, consistent over time.

String Project Armour Soft is a balanced competition monofilament tennis string: it has control, spin, power and comfort. It is born from the Armour blend, with a higher percentage of Soft Polyester, and stands out for its resilience (9/10) and tension maintenance (9/10). Arm Friendly®.

8/10 Comfort
9/10 Spin
8/10 Power
200 m reel of String Project Armour Soft monofilament tennis string

Technical Specifications and On-Court Ratings

Complete, with No Weak Points

String Project Armour Soft has it all: spin (9/10), control (8.5/10), power (8/10) and comfort (8/10). No weak points. Tension maintenance (9/10) and resilience (9/10) keep this balance the same over time.

Power8/10
Comfort8/10
Control8.5/10
Resilience9/10
Spin9/10
Tension9/10

Ratings measured in the laboratory by Pro-t-one (Eng. G. Medri), as are the technical specifications.

Performance and Comfort for the Modern Player

Armour Soft gives you what you're looking for: if you push, it pushes; if you look for spin, you find it; if you want to place the ball, it places it. All with the comfort of an Arm Friendly® string. That's why it suits very different playing styles and rackets.

Technical Data Sheet

Cross-section
Round
Available gauges
1,20 (17) · 1,24 (16L) · 1,29 (16) · 1,33 (15L)
Dynamic stiffness
215 g/mm
String Stiffness Emulator
210 lb/in
Static stiffness
0.88 kg/mm
Tension range
18 / 22 Kg

Laboratory test report · Pro-t-one (Eng. G. Medri)

PDF 1.24 mm

Technology and Composition: The Evolution of the Armour Blend

Armour Soft is born from the Armour blend, with a higher percentage of Soft Polyester. It is this composition that gives it top-of-the-range resilience and tension maintenance and a natural inclination towards power and spin.

String Project Armour Soft – white monofilament tennis string with strung racquet on a blue court

The manufacturing processes

01

Spring Load

It allows the molecular chains to contract repeatedly, with minimal tension loss and greater stability of properties over time.

02

Pre-Stretch

The pre-stretch of the core minimises tension loss and allows stringing at lower tensions.

03

Double Heating

The heat treatments remove internal stresses and any irregularities in the string, making it more uniform, flexible and elastic.

04

Liquid Wax

The string is finished with a layer of wax, which reduces wear, significantly extends its lifespan and makes stringing easier.

05

Low Friction

Reducing friction offers three advantages: less string movement, greater spin potential thanks to better snap-back, and a longer lifespan.

Competition Performance with the Pleasure of Impact

On court, Armour Soft delivers a clean impact, with no harshness: what remains is the pleasure of contact with the ball. Power and spin come naturally and fluidly. It feels like a consistent, reliable string that keeps its characteristics session after session.

Close-up of String Project Armour Soft tennis string strung on a racquet

Clean, Comfortable Impact

Armour Soft is Arm Friendly®, with 8/10 comfort. The higher percentage of Soft Polyester reduces the vibrations transmitted to the arm.

  • Clean impact, no harshness
  • Reduced vibrations to the arm
  • Comfort even in long sessions
  • Consistent, reliable feel

Competition-Level Responsiveness and Spin

With 9/10 spin and 8/10 power, Armour Soft delivers complete competition performance. Resilience (9/10) ensures consistent responsiveness over time, while tension maintenance (9/10) keeps its characteristics unchanged.

  • Natural, fluid 9/10 spin
  • Balanced 8/10 power
  • Top-tier 9/10 resilience
  • Exceptional 9/10 tension maintenance

What the Experts Say

Independent reviews published by testers and specialist outlets.

Ubitennisubitennis.comRead the review Racketpediaracketpedia.comRead the review Tennis Italianotennisitaliano.itRead the review Fabio Ferrofabioferro.blogRead the review

Who It's For

Competitive players

Those who play tournaments and want a reliable string that doesn't change behaviour from one match to the next.

4th-category players

Those who are building their game and want a complete string that supports them on every shot.

Those seeking consistency over time

Those who want a string that keeps its properties session after session. With 9/10 tension maintenance and 9/10 resilience, Armour Soft is among the most reliable strings in the range.

Ready to Discover the Pleasure of Impact?

Choose the format that best suits your needs. Free shipping from €50.

Best value

200 m Reel

~17 stringings

-

~€6.41 per stringing

  • Free shipping
  • 1 Dampener
  • 2x Dry Overgrip pack

Gauge:

Pack of 6 Sets

6 stringings

-

~€8.98 per stringing

  • Free shipping
  • 1 Dampener
  • 2x Dry Overgrip pack

Gauge:

Pack of 3 Sets

3 stringings

-

~€9.97 per stringing

  • Free shipping
  • 1 Dampener
  • 2x Dry Overgrip pack

Gauge:

Single Set

1 stringing

-

  • Free shipping
  • 1 Dampener
  • 2x Dry Overgrip pack

Gauge:

Frequently Asked Questions (FAQ) about String Project Armour Soft

What is String Project Armour Soft?

String Project Armour Soft is a balanced competition monofilament tennis string, born from the Armour blend with a higher percentage of Soft Polyester. It offers spin (9/10), control (8.5/10), power (8/10) and Arm Friendly® comfort (8/10), with top-of-the-range tension maintenance (9/10) and resilience (9/10).

What is the difference between Armour and Armour Soft?

Armour Soft is born from the same blend as Armour, with a higher percentage of Soft Polyester. This gives it more resilience (9/10 vs 8/10), more tension maintenance (9/10 vs 8.5/10) and more power (8/10 vs 7.5/10). Armour is plush and control-oriented; Armour Soft is the more balanced of the two.

At what tension should String Project Armour Soft be strung?

The recommended tension range is between 18 and 22 kg. Armour Soft maintains its properties excellently even at lower tensions, thanks to its 9/10 tension maintenance.

Which gauges is String Project Armour Soft available in?

Armour Soft is available in four gauges: 1.20 mm (17) for maximum spin and sensitivity, 1.24 mm (16L) for great balance, 1.29 mm (16) for control and durability, and 1.33 mm (15L) for maximum durability and consistency.

Is String Project Armour Soft suitable for players with arm problems?

Yes, Armour Soft is Arm Friendly®, with 8/10 comfort. The higher percentage of Soft Polyester reduces the vibrations transmitted to the arm.

How long does String Project Armour Soft last?

Armour Soft has 9/10 tension maintenance and 9/10 resilience, at the top of the String Project range. This means it keeps its playing characteristics consistent for longer than most polyesters.