Most string companies sell a catalogue. This TOROLINE review starts from a different observation: TOROLINE sells a philosophy about snapback, and almost every string in the range is a variation on it. The brand describes itself simply as tennis string specialists, and unusually for a tennis label, that focus is literal rather than aspirational.
Here is what the range actually contains, which claims are backed by outside testing, who the strings suit, and where the catalogue gets confusing.
What TOROLINE actually makes
The core of the business is co-poly tennis string, sold in three formats: single sets for one racquet, mini reels, and jumbo reels for stringers and teams. Around it sits a small accessories line: a thermal racquet sleeve, two thermal-lined bags, a stencil and a logo tee.
The strings themselves split into families rather than a flat list, which is the key to reading the store:
- The A5 family: A5 and A5 INFRARED as the round baseline, with VAMOS and A5 SPIN as shaped evolutions and CASH as a softer signature variant.
- The O-TORO family: O-TORO as the flagship spin string and O-TORO TOUR as the firmer, shaped control version.
- The soft side: TRUFFLE X and WASABI X, both built to be crosses in hybrids rather than full beds.
- The originals: TORO TORO and ENSO PRO, both offered in Matcha Green at 1.27mm.
Once you see the families, the catalogue stops looking like twenty products and starts looking like four ideas with options.
O-TORO is the string the brand is built on
O-TORO is described by TOROLINE as its best-selling and most spin-friendly string, and it was co-developed with former Top 25 ATP pro Steve Johnson. That is the kind of credential that usually means a logo on a package, but in this case the testing data is public and specific.
Racketpedia lab-tested O-TORO with a perfect 100 out of 100 spin rating. In head-to-head lab testing by Tennis Warehouse against Babolat RPM Blast, TOROLINE reports O-TORO delivering 104% higher spin potential and 29% lower stiffness. The second number matters as much as the first: lower stiffness is the comfort axis, and spin strings normally buy their bite by getting harsher.
TOROLINE also positions O-TORO as more comfortable than many of the top-selling co-polys on the market. Taken together, the claim is that you do not have to choose between spin and arm comfort, which is the oldest trade-off in polyester string.
You can see the full string range at TOROLINE.
The A5 family and the snapback argument
A5 is where the brand explains its engineering thinking most clearly, and it is worth following because it tells you how to choose within the range.
TOROLINE frames spin potential as the product of two things: ball grip and snapback. Round strings have smooth geometry, so they generate less grip. To compete on spin, a round string has to make that back up with exceptional snapback. A5 is the round answer, a premium co-poly tuned for modern swing speeds with strong snapback, tension stability and what the brand calls a pure connected response at contact.
The shaped versions attack the grip side instead. VAMOS, developed with Jonas Eriksson of Tennisnerd, is a six-sided hexagonal profile in 1.23mm designed to grab the ball longer and launch higher. A5 SPIN is a five-sided pentagonal profile, also 1.23mm, positioned as the middle ground between the precision of a round string and the aggression of a more angular one.
That is a coherent product ladder. Round for control and predictability, pentagonal for more bite without losing the plot, hexagonal for maximum grip and a higher launch. Very few brands lay the logic out this plainly.
CASH and the doubles case
CASH is the most interesting string in the range because it solves a problem almost nobody markets to.
Developed with Julian Cash, 2025 Wimbledon Doubles Champion and Year-End World Number 1 in doubles, it is built off the A5 foundation with a softer flex profile tuned to increase dwell time and improve feel. TOROLINE's reasoning is that doubles is faster, with less time and less space, so a string needs to help you absorb pace and redirect returns precisely rather than simply generate topspin from the baseline.
Signature strings are usually a marketing exercise. This one has an actual design brief behind it. If you play mostly doubles and you have been stringing a singles baseline poly because that is what the shop stocks, this is the pitch worth listening to. Doubles-first players will also find our guide to the best tennis and pickleball bags useful for the rest of the kit.
Hybrids: where TOROLINE gets serious
The soft strings in the range are not sold as full beds, and the brand is honest about that.
TRUFFLE X is described as TOROLINE's softest and most elastic string, built from a next-generation polymer intended to replace traditional multifilaments and natural gut. WASABI X is an ultra-slick round co-poly designed primarily as a cross, letting the mains slide and snap back more freely, and it is specified to pair well with shaped or textured mains.
The brand then sells the pairings pre-made, which is the genuinely helpful part. The STEVIE blend, designed by Steve Johnson in his role as TOROLINE's Chief String Officer, puts O-TORO TOUR in 1.23mm mains against TRUFFLE X in 1.30mm crosses. The rotating Chef Conor's Monthly Special, curated by Coach Conor Casey, pairs A5 INFRARED 1.20 mains with TRUFFLE X 1.30 crosses for players who want co-poly control without the stiffness.
Selling a hybrid as a single product removes the main barrier to trying one, which is having to guess two gauges and two tensions at the same time.
The accessories are for stringers, not shoppers
The non-string products are unusually purposeful, and they all circle the same theme: heat is the enemy of tension.
The TOROSLEEVE is a thermal-lined racquet sleeve built to reduce heat buildup courtside, in a car boot or between matches, because heat accelerates tension loss and alters string performance. The MINI DUFFLE BAG was designed specifically for stringers to hold a couple of mini reels and stringing essentials, in PU vegan leather at 11 by 5 by 7 inches with a thermal-lined interior and two external zip pockets. The full DUFFLE BAG scales that to 20 by 11 by 11 inches with a trolley sleeve that converts into an extra pocket.
There is also a holographic stencil at 8 inches high by 7.25 inches wide, ink not included, limited to one per customer. And a Katakana box logo tee in a 50% polyester, 25% combed ring-spun cotton, 25% rayon tri-blend at 3.4 oz per square yard, pre-shrunk and side-seamed, printed to order.
The honest caveats
- The naming is opaque. A5, A5 INFRARED, A5 SPIN, VAMOS, CASH, O-TORO, O-TORO TOUR, TRUFFLE X, WASABI X, TORO TORO, ENSO PRO. Nothing in the names tells you gauge, shape or stiffness, so you have to read every description.
- Some products are gated or temporary. The A5 SPIN prototypes and the holographic stencil are flagged as captains-only items, and Chef Conor's Special is a monthly rotation, so availability moves.
- It is a specialist store. There are no racquets, no shoes, no grips beyond the accessories above. Clothing ships in a separate box from strings, which the brand states outright.
Who TOROLINE is for
Intermediate and advanced players who already know they want a co-poly and are choosing between full-bed spin, full-bed control or a comfort hybrid. The depth of the range only pays off if you have opinions about gauge and shape.
It also suits stringers and captains directly, which is rarer. Jumbo reels, mini reels, a stringer-specific bag and thermal storage are all pointed at people stringing for a team rather than for themselves. Players still building out the rest of their kit may want our roundup of tennis pieces worth buying alongside it.
Beginners are the group least served. Nothing in the range is a soft synthetic gut starter string, and a full bed of premium co-poly is the wrong first choice for a developing arm.
Browse the strings, reels and accessories at TOROLINE.