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Here’s a list of string constructions, general descriptions of their associated performance benefits and examples of each:

1. Solid Core with One Outer Wrap

Most popular nylon string construction - majority of “synthetic gut” strings are solid core/single wrap. Main benefits are tension maintenance and crisp feel. Quality of nylon center core, as well as size and orientation of outer wraps can influence feel and comfort.

Babolat Conquest
Gosen OG Sheep Micro
Gosen OG Jim Courier
KLIP Scorcher
Prince Synthetic Gut Original
Wilson Stamina Synthetic Gut

2. Solid Core with Multi Wraps

Provides additional durability and cushioning.

Gamma Gut 2
Gamma TNT Pro Plus
KLIP Scorcher

3. Multifilament (no wraps)

Bundles of micro synthetic fibers are twisted together, similar to natural gut. Nylon multifilaments are typically more comfortable than solid core strings due to the cushioning effect of hundreds or even thousands of micro fibers. Resultant effect is a soft and comfortable string, recommended for players suffering from arm problems who don’t want to pay the high price for natural gut. Normal use causes multifilament strings to fray, like gut, which can be alarming to players switching from solid core strings. With the exception of Kevlar and Zyex, multifilament strings are generally classified as “soft” strings.

Babolat X-Cel Premium
Gamma ESP
Head Fiber Gel
KLIP Excellerator
Prince Premier w/SoftFlex
Tecnifibre 515, NRG2, X-One BiPhase
Wilson Sensation, Sensation NXT

4. Multicore with Wraps

Smaller multifilament core with one or more outer multifilament wraps. Offers similar comfort benefits to multifilament strings with added durability.

Babolat Powergy
Gamma Live Wire
Head RIP Control

5. Textured

Designed to offer enhanced spin potential by wrapping an extra filament around the outer wraps or incorporating larger filaments into the outer wrap. Most effective texture string is Gamma Ruff. While officially a geometric string, Forten Kevlar Gear is included in our “Textured String” category and provides equal or greater spin potential as Gamma Ruff. Other examples include:

Gamma TNT Pro Plus Spin
Prince Topspin and Topspin Plus
Wilson Extreme Spin

6. Composites

A combination of different materials blended together in an attempt to bring out the best features of each material. For simplicity, strings combining different grades of nylon, which are theoretically also composite strings, aren’t included in this list.

Gamma TNT Extreme Spin 19
TNT Fusion Plus
Head RIP Control, RIP Ti. Fibre, Ti. Fibre (coating)
Luxilon Big Banger, ALU-Power (polyester & fluorocarbon resin) Prince Perfection, Pro Blend (Duraflex), Synthetic Gut w/Duraflex, Topspin (Duraflex)

7. Monofilament Polyester

Durability-oriented monofilament string. All currently available monofilament strings are polyester. Good alternative to Kevlar hybrids because it’s less stiff but it has a dead feel and high initial tension loss. Recommended for frequent string breakers who don’t want to resort to Kevlar hybrids. String 3-5 lbs. higher than nylon to compensate for tension loss.

Babolat Pro Hurricane
Gosen Polylon
Kirschbaum Super Smash & Super Smash Spiky
Tecnifibre Polyspin

8. Aramid Fiber Hybrids

Combines the strength and abrasion resistance of Kevlar mains with nylon (synthetic gut) crosses. Most durable of all string construction, but least “playable” due to Kevlar’s extremely stiff, dead feel. All current Kevlar string sets are hybrids, combining Kevlear mains and synthetic crosses.

Ashaway Crossfire 16 and 17
Forten Kevlar Gear and Thin Blend 18
Gamma TNT Fusion 19 and TNT Fusion Plus 16
Head Kevlar Blend 16
Prince Pro Blend Duraflex 16, Pro Blend Soft 16 and Pro Blend Spin 17
Wilson Hammer Last 16 and Hammer Last 19.