Now I have sailed into some strange harbors in my years on the water — Murmansk in January, the Barents Sea in a force eight gale, once a very confusing port in the Azores where a man tried to sell me a goat — but nothing prepared me for the day I found myself in Kirkenes, Norway, squinting at a spool of Volkl V-Square 17g tennis string and wondering what the sea was trying to tell me.

Kirkenes, mind you. The kind of town that sits so close to the Russian border you could practically shake hands with a Soviet monument from the church steps, which I did, more or less, wandering between the Kirkenes Church and the Soviet Liberation Monument on a morning so cold my beard was navigating independently.

And there in a little shop, a set of this string, red and purposeful as a warning buoy.

Let me tell you about the V-Square, because she deserves a proper introduction the way any fine vessel does. Volkl built this string with a square profile — four corners, four edges, like a hull cut to bite the water rather than slide over it.

That geometry is no accident and no decoration.

Those edges grip the ball, and when they grip the ball they spin it, and when they spin it the way this string spins it, you understand why landlocked people play this game at all.

The gauge is 17g, which for those of you raised on proper units means approximately 1.20 to 1.25 millimeters of co-polyester monofilament, thin enough to snap through the air with conviction, firm enough to hold its course like a helmsman who has had enough coffee.

A single set will string one racquet and leave you no excess for foolishness, which is how I prefer my supplies — precise, no wastage, ready for the crossing.

Co-polyester is the material, and if you want the honest sailor's account of it: it is stiffer than a multifilament, it does not coddle your arm the way a softer string might, and it rewards players who swing with commitment rather than caution.

Advanced players, players who generate their own pace, players who want topspin that would make a compass needle nervous — this is their string. Recreational players who already carry an elbow complaint the way I carry a suspicion of all rivers should perhaps look elsewhere, and I say that with the warmth of a man who has seen good sailors choose the wrong rope.

Now, I strung a racquet with this in Kirkenes. Took it to a wall near the Borderland Museum, which is itself a place that understands friction and tension between opposing forces, and I hit against that wall until my arm remembered what effort felt like.

The snap off the strings reminded me of something a first mate once told me in Fort Lauderdale, where he was completing some sort of Fort Lauderdale themed cardiovascular workout on the waterfront and stopped to explain that real exertion should make you feel surprised by your own body. He was not wrong. The V-Square does that.

You swing, and the ball obeys with an enthusiasm that is almost embarrassing.

The Andersgrotta bunker is nearby — a tunnel the town used for shelter, carved into the rock, which is what Kirkenes people do when the world becomes too much. I thought about that as I packed the string away.

Sometimes a product is also a kind of shelter — something that gives you control when the match is moving too fast and the wind is coming off the Barents and your opponent is six feet tall and hitting flat. It is not soft, it is not forgiving, it is not a hammock. It is a deck, and a deck holds you up precisely because it does not give.

The V-Square is that shelter.

Red color, square cross-section, 17 gauge, co-polyester, one set per packet. Simple specifications for a string that does complicated things. Trust the geometry. Trust the edges. And if you find yourself in Kirkenes wondering about your string choice, know that the sea is very close and it agrees with me.

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