Volkl Power Fiber Pro is a control-oriented multifilament tennis string designed to combine high comfort with better durability and a more restrained launch than Power Fiber II. It targets players who want synthetic softness but need greater confidence on full swings.
Volkl uses a low-friction coating and an advanced, firmer construction to improve tension behavior and physical resistance. Independent retailer analysis also describes larger filaments and a firmer bonding resin than those found in many plush power multis.
Power Fiber Pro suits beginners through advanced club players, particularly non-breakers who want comfort without excessive rebound. The Tennis String Finder can help compare it with softer and more powerful alternatives.
Volkl Power Fiber Pro Rating
| Category | Rating |
|---|---|
| Power | 8/10 |
| Spin | 7.5/10 |
| Comfort | 9/10 |
| Control | 8.5/10 |
These ratings compare Power Fiber Pro with the complete market. It is controlled and durable for a multifilament, not equivalent to firm polyester.
Volkl Power Fiber Pro Specifications
| Specification | Details |
|---|---|
| String type | Multifilament |
| Construction | Larger synthetic filaments with firmer bonding resin |
| Profile | Round |
| Surface | Low-friction protective coating |
| Gauges | 15L / 1.35mm, 16 / 1.30mm, 17 / 1.25mm and 18 / 1.20mm |
| Colors | Turquoise, Lava, Neon Yellow and Neon Orange, depending on gauge |
| Set length | Approximately 12m |
| Reel length | Approximately 200m in selected combinations |
Not every color is offered in every gauge. The 1.35mm and 1.20mm options have more limited availability than the central gauges.
Material and Construction
Power Fiber Pro contains multiple synthetic filaments bound into a round string. It is not polyester, natural gut or a simple solid-core synthetic gut.
Its firmer bonding system reduces the highly elastic response associated with many power multifilaments. This produces a more direct impact and a lower, more predictable launch.
The low-friction coating protects the fiber bundle and helps the strings move while fresh. It also improves suitability as a hybrid partner.
No coating prevents wear permanently. The exterior eventually notches or frays, after which movement and control can decline.
Volkl Power Fiber Pro Performance
Power
Power Fiber Pro provides easy depth but is less explosive than Power Fiber II or natural gut. Its flexible fibers assist compact and moderate swings without making the response excessively springy.
That balance works well in modern powerful rackets. Faster hitters can still manage the trajectory more easily than with a very soft multifilament.
The thinner gauges add liveliness, while 1.35mm produces the calmest launch.
Power rating: 8/10
Spin
Spin is above average for a multifilament. The low-friction coating supports movement and snapback while fresh, and the controlled power lets players accelerate confidently.
The string does not use geometric edges. It cannot reproduce the persistent bite of shaped polyester, especially after the coating wears and intersections notch.
The 1.20mm and 1.25mm gauges provide the easiest ball access, but also wear faster under topspin.
Spin rating: 7.5/10
Control
Control is the defining advantage over Power Fiber II. The firmer construction and restrained rebound create a predictable trajectory for medium and moderately fast swings.
This makes Power Fiber Pro useful for all-court play, flat drives and volleys. It also suits players leaving polyester who do not want an abrupt move to a very lively multi.
Advanced heavy hitters may still require polyester-level containment. Control also changes as tension drops and the strings stop returning.
Control rating: 8.5/10
Comfort and Feel
Power Fiber Pro remains highly comfortable despite its firmer identity. The multifilament bundle cushions impact and provides more forgiveness than polyester.
Its feel is connected and moderately crisp rather than extremely plush. Some players will prefer that feedback, while others may want the softer pocketing of Power Fiber II.
Comfort is not an injury-treatment claim. Persistent pain requires qualified assessment and a review of the complete playing setup.
Comfort rating: 9/10
Durability and Tension Maintenance
Physical durability is excellent for a multifilament. The thicker gauges, larger filaments and coating improve resistance to abrasion compared with many soft multis.
That advantage remains relative to other multifilaments. A frequent string breaker can still cut through it much faster than a polyester, especially in an open pattern where the strings move across one another more aggressively.
Heavy topspin can still produce fraying and breakage. Polyester remains more resistant for many frequent breakers, although its useful elasticity may expire first.
Tension maintenance is a product strength. Replace Power Fiber Pro when launch becomes inconsistent, the coating is deeply notched or the fiber bundle is close to failure.
Choosing the Right Gauge
| Gauge | General characteristics |
|---|---|
| 15L / 1.35mm | Maximum control and physical resistance |
| 16 / 1.30mm | Best general balance of control, comfort and life |
| 17 / 1.25mm | More power, spin and feel with faster wear |
| 18 / 1.20mm | Maximum response for dense patterns and non-breakers |
The 16 / 1.30mm version is the safest starting point. Frequent breakers can move thicker, while dense patterns can use 1.25mm or 1.20mm.
Full Bed or Hybrid Setup
Full Bed
A full bed produces the intended combination of comfort, control and moderate power. It suits a broad range of club players who do not break multifilaments rapidly.
The 1.30mm gauge is the most versatile full-bed choice.
Volkl Power Fiber Pro in the Mains With Polyester Crosses
Power Fiber Pro mains preserve softness and depth. A smooth polyester cross reduces launch and adds firmness.
Polyester contact increases notching, especially when the cross is sharply shaped.
Polyester Mains With Volkl Power Fiber Pro Crosses
Polyester mains dominate spin and control, while Power Fiber Pro crosses add comfort. Its coating makes it a practical cross for established polyester users.
The result remains firmer than a complete multifilament bed and should not be presented as equally forgiving.
General Tension Guidance
Power Fiber Pro can begin near a player’s established nylon or multifilament reference. Players changing from polyester should account for greater elasticity and launch.
Lower tension adds power and pocketing. Higher tension creates a firmer trajectory but can reduce comfort and strain the fibers.
Stay inside the racket manufacturer’s range and adjust gradually. The Tennis String Tension Calculator provides broad guidance.
Who Should Use Volkl Power Fiber Pro?
Power Fiber Pro is best suited to:
- Club players wanting comfort with added control
- Former polyester users seeking a softer full bed
- All-court and doubles players
- Non-breakers wanting better multifilament durability
- Powerful-racket users needing restrained rebound
- Hybrid users wanting a coated soft component
Who Should Avoid Volkl Power Fiber Pro?
Power Fiber Pro is less suitable for:
- Frequent multifilament breakers
- Advanced hitters needing maximum poly control
- Players seeking the softest possible pocketing
- Heavy-spin users relying on persistent snapback
- Buyers wanting a budget synthetic gut
- Anyone expecting a string to prevent injury
Pros and Cons
| Pros | Cons |
|---|---|
| Excellent control for a multifilament | Less plush than Power Fiber II |
| High comfort | Cannot match polyester break resistance |
| Low-friction coating | Coating eventually wears |
| Four gauge options | Color availability varies by gauge |
| Strong category durability | Less free power than livelier multis |
| Useful in full beds and hybrids | Premium price over synthetic gut |
Volkl Power Fiber Pro Compared With Other Strings
Power Fiber Pro vs Volkl Power Fiber II
Volkl Power Fiber II is softer, livelier and more gut-like. Power Fiber Pro supplies stronger control and physical resistance.
Power Fiber Pro vs HEAD Velocity MLT
HEAD Velocity MLT is an excellent value multi with controlled power. Power Fiber Pro offers more gauge choices and a premium low-friction coating.
Power Fiber Pro vs Tecnifibre Triax
Tecnifibre Triax combines nylon and polyester fibers for additional control and durability. Power Fiber Pro remains a more conventional comfort-focused multifilament.
Power Fiber Pro vs Prince Premier Control
Prince Premier Control also targets controlled multifilament play. Preferred feel, gauge and local price will distinguish them.
Final Verdict
Volkl Power Fiber Pro is a strong option for players who want multifilament comfort without an excessively lively launch. Its firmer construction and low-friction coating provide useful control, spin access and category durability.
It cannot match polyester for repeated heavy-spin abuse, and it is less plush than Power Fiber II. Those tradeoffs define its practical middle position.
The 16 / 1.30mm version is the best starting point. Move thicker for resistance or thinner for dense patterns and greater response.
Frequently Asked Questions
Is Power Fiber Pro a polyester string?
No. It is a synthetic multifilament with a firmer bonding system and protective coating.
Is it softer than Power Fiber II?
No. Power Fiber Pro is intentionally firmer and more controlled, although both are highly comfortable.
Which gauge should most players choose?
The 16 / 1.30mm version provides the most balanced setup.
Is it good for spin?
It offers good spin for a multifilament, but shaped polyester produces stronger and longer-lasting bite.
Can it be used in a hybrid?
Yes. It works as either the soft main or cross, with wear determined by the polyester partner and orientation.
Does the coating prevent all string movement?
No. It reduces friction and supports return while fresh, but notching and surface wear eventually make the strings less mobile.