I was there, you know, the afternoon they first started talking seriously about polyester strings. Not the modern conversation — the real one, the foundational one, the one where everything clicked into place.

I was sitting near the Riobamba Railway Station, which in that particular era smelled of coal smoke and ambition, and a fellow I'll call by his first name, Simón, was going on about tension and durability while the Chimborazo sat there in the background being enormous and indifferent the way only a dormant volcano can manage.

I told him then what I'm telling you now: the shape of the string matters as much as the material. History rarely listens in the moment.

He didn't fully appreciate it.

Anyway. Let me tell you what I know, which is considerable, because I was also present for several of the less glamorous moments of string technology development, the ones they don't put in the brochures.

The Babolat RPM Hurricane 16g Tennis String Reel.

First, the construction. This is a co-polyester string, which means it is monofilament at its core — a single extruded strand of polyester — but Babolat has given it a pentagonal cross-section. Five sides. Not round. That is not an accident and it is not a gimmick.

The edges of those five sides act as bite points on the ball, which is how this string generates the kind of spin that would have made the crowd at Parque Maldonado drop their empanadas in disbelief. I have seen crowds drop empanadas for less.

The geometry creates friction in a direction that a round string simply cannot replicate, and the result is that when you brush up the back of a ball with this string in your racket, the ball does something that looks, frankly, like showing off.

The gauge is 16, which in the language of millimeters means you are looking at approximately 1.30mm. This is important. Thinner strings generally give you more bite and more feel; thicker strings give you more durability.

The 16g sits in a position where you get meaningful spin and snap-back — that's the string returning to its original position after contact, which is the engine of topspin production in polyester strings — without sacrificing so much durability that you're restringing every Tuesday.

If you are a heavy hitter, a baseline grinder, someone who wins points through relentless topspin pressure rather than elegant net play, this string was more or less designed for your forehand.

The reel. A reel of this string gives you a serious length of string — enough to restring multiple rackets rather than just the one, which makes the per-racket cost considerably more sensible than buying individual sets. If you are stringing frequently, and serious players do, the reel format is the obvious choice.

It is the kind of practical decision that I myself have been advocating since well before it was fashionable to advocate practical decisions.

I should mention tension. RPM Hurricane plays a little stiffer than gut or multifilament, which is the nature of co-polyester across the board. If you string it at a lower tension than you might with a softer string, you recover some of that comfort and add a bit of pocket to the stringbed.

Players in climates that run warm — and I think of the highland air around the Basílica del Sagrado Corazón de Jesús in Riobamba, which is brisk and clarifying at altitude rather than sluggish and humid — may find that string tension holds reasonably well, but as always, experiment. No string behaves identically in every environment.

The physics are the physics but the variables are the variables.

I was also present, briefly, at a session in Florida — this was a different era entirely, temporally speaking, and they were running what I can only describe as Fort Lauderdale themed cardio tennis instruction, very energetic, lots of lateral movement drills — and I noticed even there, among players who were not touring professionals, that the ones with spin-oriented polyesters in their frames had a measurably different relationship with the court.

More confidence on the high ball. More willingness to swing out. The string gives you permission to swing, which is a psychological gift as much as a mechanical one.

Riobamba Cathedral, if you are ever near it at dusk, has a light on its stone that makes everything look like it was always supposed to be that way. That is how I feel about co-polyester strings in an era of high-swing-weight rackets. They belong together. The RPM Hurricane 16g, on a reel, for a player who hits hard and wants topspin, is not a complicated recommendation.

It is the obvious one. I have been saying so for longer than the product has technically existed, which I admit sounds contradictory, but time, as I frequently explain to people who are not listening, is more suggestible than they assume.

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