Prince Synthetic Gut with Duraflex is a solid-core nylon string designed to provide balanced power, comfort, control and value. It is one of the best-known synthetic guts and sits between basic Tournament Nylon and Prince’s more elaborate Lightning constructions.
Duraflex reinforcement is the main point of difference from Prince Synthetic Gut Original. The added wear-resistant fibers are intended to reduce notching and make the response slightly firmer without turning the string into polyester.
This string targets beginners, recreational players, club competitors and hybrid users who want an affordable all-rounder. The Tennis String Finder can help players compare it with multifilament and co-polyester alternatives.
Prince Synthetic Gut Duraflex Rating
| Category | Rating |
|---|---|
| Power | 8/10 |
| Spin | 7.5/10 |
| Comfort | 8.5/10 |
| Control | 7/10 |
These ratings reflect strong all-around playability rather than category-leading specialization. Independent playtesting similarly places power and comfort above control and physical durability.
Prince Synthetic Gut Duraflex Specifications
| Specification | Details |
|---|---|
| String type | Reinforced synthetic gut |
| Composition | Nylon |
| Construction | Solid central core with outer wraps and Duraflex reinforcement |
| Profile | Round and smooth |
| Common gauges | 15L / 1.35mm, 16 / 1.30mm, 17 / approximately 1.25mm and 18 / 1.20mm |
| Colors | White, Natural, Black, Gold and several regional colors |
| Set length | Approximately 12.0m to 12.2m |
| Reel length | Approximately 200m |
Gauge diameters and colors can differ by market. Some regional Prince listings describe the 17 gauge as 1.22mm, while many international retailers list approximately 1.25mm.
Material and Construction
Prince Synthetic Gut Duraflex uses a solid nylon monofilament at the center. This core supplies strength, rebound and the crisp response associated with traditional synthetic gut.
Outer nylon wraps modify feel and support the core. Duraflex fibers are incorporated around the central structure to create a wear barrier at the string intersections.
The Duraflex name should not be interpreted as polyester composition or a spin coating. Prince identifies the string as nylon, and the technology is primarily intended to reduce notching and improve physical resistance.
The exterior is smooth and round. Spin comes from pocketing, technique and ordinary string movement rather than shaped edges or a specialized low-friction surface.
Compared with Prince Synthetic Gut Original, Duraflex generally feels slightly firmer and more resistant. Compared with premium multifilament, it has a simpler core-and-wrap construction with less plushness but a much lower price.
Prince Synthetic Gut Duraflex Performance
Power
Power is easy to access. The nylon core stretches and returns energy more readily than most polyester strings, helping moderate swings create depth.
Independent playtesting places the string between polyester and premium multifilament. It is livelier than co-polyester but less explosive than natural gut or a highly elastic multifilament.
Thinner gauges increase response and launch, while the 15L and 16 versions feel more stable. Tension and racket pattern can therefore change perceived power significantly.
Players with long, fast swings may need a firmer setup or greater spin to control depth. Beginners and recreational players should find the rebound accessible without being extreme.
Power rating: 8/10
Spin
Prince Synthetic Gut Duraflex offers respectable spin for a smooth nylon. Independent playtesting found enough topspin and slice for all-around play, although it did not match shaped polyester.
The strings tend to move and remain displaced rather than snapping back as efficiently as low-friction co-polyester. Players may need to straighten the mains after heavy rallies.
The 17 and 18 gauges can provide greater ball interaction and movement, while the thicker options prioritize resistance. Technique remains the main source of rotation.
Players who rely on extreme topspin may break the string quickly or find its trajectory too lively. Moderate-spin and all-court players are a better fit.
Spin rating: 7.5/10
Control
Control is balanced rather than exceptional. The solid core produces a predictable response, while Duraflex reinforcement makes the bed slightly firmer than many soft nylon strings.
The string does not have the low-powered launch of polyester. Advanced players with fast swings may need to manage its elasticity through gauge, tension and racket pattern.
For beginners and club players, the combination of pocketing and moderate firmness supports directional accuracy without requiring perfect contact.
Control declines as tension drops, notching deepens and the strings move permanently. A fresh installation should not be compared with one that has been used far beyond its best response.
Control rating: 7/10
Comfort and Feel
Comfort is one of the string’s strengths. Nylon is more elastic than polyester, and independent testers have described Synthetic Gut Duraflex as easy on the arm across appropriate tensions.
The feel is crisp rather than exceptionally plush. Duraflex reinforcement and the solid core produce clearer feedback than a heavily dampened multifilament.
Thinner gauges can feel livelier and provide greater pocketing, while thicker gauges create a firmer, more stable contact. Color formulations may also produce small perceived differences, although these should not be overstated.
The string is not a medical treatment. Players with continuing pain should review the complete setup and seek qualified medical advice when necessary.
Comfort rating: 8.5/10
Durability and Tension Maintenance
Duraflex improves resistance relative to an unreinforced synthetic gut, but the result remains nylon. Heavy topspin players can notch and break it much faster than recreational or flatter hitters.
Gauge has a major effect. The 15L and 16 versions contain more material and normally resist wear better than the 17 and 18 versions.
Physical durability should not be confused with useful playability duration. Independent testing found gradual tension loss, movement and changing response, even when some players broke the string before those changes became severe.
Duraflex can slow notching, but it does not create polyester-level abrasion resistance or permanent tension stability. Hybrid contact with a firm or shaped polyester may accelerate wear.
Replace the stringbed when notching is deep, mains require constant straightening, trajectory changes or feel becomes inconsistent. Record gauge and hours because different versions should not be expected to last equally.
Choosing the Right Gauge
Prince Synthetic Gut Duraflex offers more gauge flexibility than most value nylons.
| Gauge | General characteristics |
|---|---|
| 15L / 1.35mm | Maximum nylon resistance and stability, with less response |
| 16 / 1.30mm | Best all-around balance for most recreational and club players |
| 17 / approximately 1.25mm | Greater feel, response and spin, with reduced lifespan |
| 18 / 1.20mm | Maximum sensitivity and movement, with the least resistance |
Regional diameter labels should be checked before purchase. The 16 / 1.30mm version is the safest general starting point.
Full Bed or Hybrid Setup
Full Bed
A full bed provides balanced power, comfort and predictable nylon response. It is a strong starting point for beginners and recreational players who do not need polyester.
Gauge can then be adjusted according to breakage and desired feel rather than changing material immediately.
Prince Synthetic Gut Duraflex in the Mains With Softer Crosses
Duraflex mains create a crisp, value-focused response. A softer multifilament cross can add pocketing and comfort, although this raises cost and may not produce a major benefit over a complete multifilament bed.
The softer crosses may fray first, while the reinforced nylon mains retain their structure longer.
Softer Mains With Prince Synthetic Gut Duraflex Crosses
Natural gut or multifilament mains provide power, touch and comfort. Duraflex crosses reduce cost and add a slightly firmer response.
It is also widely used beneath polyester mains, where it softens impact and lowers hybrid cost. In that orientation the polyester is not softer, and its movement can cut through the nylon cross.
General Tension Guidance
Synthetic Gut Duraflex can begin near the middle of the racket manufacturer’s recommended nylon range. It does not require the same low reference tension commonly used for firm polyester.
Players seeking more power and pocketing can move modestly lower. Players seeking a firmer launch can make a small increase while monitoring comfort.
Gauge matters: a thin 17 or 18 gauge may feel livelier at the same reference tension than a thick 15L version. Racket head size and pattern density also influence launch.
The Tennis String Tension Calculator can help organize these variables. Change one factor at a time and keep notes on gauge, color, frame and tension.
Who Should Use Prince Synthetic Gut Duraflex?
Synthetic Gut Duraflex is best suited to:
- Beginners and recreational players seeking an all-rounder
- Club players who prefer nylon over polyester
- Budget-conscious players and frequent stringers
- Players who want several gauge and color choices
- Hybrid users seeking an affordable cross string
- Players who value comfort with a crisp response
Who Should Avoid Prince Synthetic Gut Duraflex?
Synthetic Gut Duraflex is less suitable for:
- Heavy topspin breakers expecting polyester resistance
- Advanced players requiring a very low-powered launch
- Players seeking premium natural-gut pocketing
- Players who dislike strings moving out of position
- Players expecting Duraflex to prevent all notching
- Anyone who needs a specialized maximum-spin profile
Pros and Cons
| Pros | Cons |
|---|---|
| Excellent all-around value | Less control than performance polyester |
| Comfortable nylon response | Less plush than premium multifilament |
| Several gauges and colors | Can move and require straightening |
| Duraflex improves wear resistance | Heavy topspin players may break it quickly |
| Useful in full beds and hybrids | Tension loss gradually changes response |
| Accessible power | No shaped edges or specialized snapback coating |
Prince Synthetic Gut Duraflex Compared With Other Strings
Synthetic Gut Duraflex vs Prince Tournament Nylon
Prince Tournament Nylon is thicker, simpler and usually less expensive. Duraflex provides more gauge choice and a more refined balance of feel and resistance.
Synthetic Gut Duraflex vs Prince Topspin
Prince Topspin adds a textured surface for greater nylon bite. Synthetic Gut Duraflex is smoother and more versatile as an all-around full bed or cross.
Synthetic Gut Duraflex vs Prince Lightning Pro
Prince Lightning Pro uses a more elaborate co-extruded core, multifilament wrap and Powerfoil ribbons. Lightning Pro is softer and livelier, while Duraflex is simpler and less expensive.
Synthetic Gut Duraflex vs Wilson Synthetic Gut Power
Wilson Synthetic Gut Power uses high-energy wraps for responsive power. Both are value all-rounders, with Prince emphasizing Duraflex wear reinforcement.
Final Verdict
Prince Synthetic Gut Duraflex remains a genuine all-round value string. Its solid nylon core supplies predictable rebound, while outer wraps and Duraflex reinforcement add comfort and resistance.
It should not be oversold as maximum-durability or maximum-spin equipment. Independent evaluation supports good power, comfort and general playability, with more ordinary control and physical life for aggressive polyester users.
For beginners, club players, hybrid stringers and anyone seeking an affordable baseline comparison, the 16 / 1.30mm version is a sensible starting point. Thicker and thinner gauges then allow meaningful adjustment without leaving the family.
Frequently Asked Questions
What is Duraflex?
Duraflex is a wear-resistant reinforcement placed around the solid nylon core to reduce notching and improve physical life.
Is Prince Synthetic Gut Duraflex polyester?
No. Prince identifies it as nylon synthetic gut.
Which gauge should most players choose?
The 16 / 1.30mm version provides the most balanced starting point for power, comfort and resistance.
Is it comfortable?
Yes. It is more comfortable than most firm polyesters, although less plush than premium multifilament or natural gut.
Does it provide good spin?
It offers respectable spin for smooth nylon, but it does not match every shaped co-polyester for snapback and bite.
Is it a good hybrid cross?
Yes. It is affordable and comfortable, though moving polyester mains can notch and break it.
How long does it last?
There is no universal lifespan. Gauge, swing style, pattern and hybrid partner determine both physical resistance and useful response.