1D - One Design Sails

01/06/2026

Foiling a-cat with Emil Järudd
📸 Guppypix - Gordon Upton

01/06/2026

27/05/2026

Our sweet F16 boys were so young back then 😄
2017 feels like yesterday… and look where they are now.
Still collecting titles together!
French F16 Champions again 🇫🇷🏆

Emmanuel Le Chapelier and Eric Le Bouëdec at the F16 French Nationa...

27/05/2026

Another trophy for Manu Le Chapelier and Éric Le Bouëdec in the F16 class! This time at the French Championship, in what seems to have been one of the biggest F16 fleets ever.

For us, national championship victories matter a lot. These events bring together strong fleets, different sailing styles, changing conditions, and real pressure. A national title is not won in a perfect test environment, but on the racecourse, against sailors who know the class, know the boats, and know how to push hard.

That is exactly why results like this are so valuable for us: feedback and confirmation.
They show that the work behind the design, the materials, the cut, the details and the continuous development is going in the right direction.

We are proud to see 1D sails winning not only at international events, but also in strong national championships where consistency, speed and control matter race after race.

Congratulations to Manu and Éric, French F16 Champions.
Thank you for keeping our sails at the front of the fleet, since 2015!

1D - One Design Sails
Proven on the racecourse.

🏆 Vainqueur du National F16 2026 🥇🚀

Magnifique National F16 à Sévrier sur le Lac d’Annecy avec 23 équipages venus de toute l’Europe: Suède 🇸🇪, Hollande 🇳🇱, Suisse 🇨🇭 et Belgique 🇧🇪.

2ème Yohan Debauque & Denis Calvet 🇧🇪 🇫🇷
3ème Anna Kroon & Matthijs Spijk 🇳🇱

BeFoil Befoil
1D - One Design Sails
Forward WIP
Cercle Nautique du Ferret
Eric Le Bouëdec

THEIX INOX Diffusion
AFU

Cercle de voile Sevrier

21/05/2026

PROVEN. SHARP. RELENTLESS.

Great sails are not built from one result. They are built over seasons: through development, testing, racing, feedback, long conversations, small changes and constant refinement.
That is why we are looking back at some of the key moments behind the Formula 18 sails of 1D. Not for nostalgia, but because today’s 1D F18 sails are built on everything we have learned on the racecourse.

After 2018, we knew we had something strong, but we also knew one very important thing: it was not finished. A winning sail does not make us stop. It makes us ask better questions.
So we went straight back into development with new ideas for the mainsail, new thoughts on the jib, a new generation of gennaker, and even more testing, feedback and conversations with sailors.

In 2019, the 1D F18 concept proved something that really mattered: it was not a one-boat success.
At the Formula 18 World Championship in Spain, 1D sails were visible across the fleet. More than half of the fleet had at least one 1D sail, several teams raced with full 1D sets, and six boats finished in the top 10 with 1D sails.
Dani and Kostas, the previous World Champions, finished second. The Argentinian team finished third, and that event became the beginning of a long and special relationship between 1D and the Argentinian F18 sailors.
But for us, the real story of 2019 was not only the result list. It was the feedback.

Darren Bundock was racing with Connor James Nicolas and using 1D Sails for the first time. Later, when we talked about that event, he said something we never forgot: he liked the jib, and he could understand the mainsail very clearly.
That matters, because an F18 sail should not only be fast on paper. It has to be fast in the hands of real sailors. You need to feel what it wants, understand how to trim it, and make it work when the fleet is tight, the pressure is high, and there is no time for guessing.

That year shaped one of the most important ideas behind our Formula 18 sails: the goal is not only to design the fastest possible sail. The goal is to design the fastest possible sail in a way that makes its speed easier to access.
Because in the end, sails are not used by computers. They are used by sailors.

So when you choose your next F18 sail, choose one that has been proven across sailors, platforms and conditions. A sail that has been tested, refined and already delivered.

1D’s F18 sails are not just designed to be fast. They are proven fast — across the fleet.
This is the second chapter of the story behind our F18 sails.
Looking for your next Formula 18 sail set? Talk to us and choose the sailmaker with proven F18 performance.

20/05/2026

Last chance before the F18 Europeans 2026!

If you want your new 1D F18 sails ready in time for the F18 Europeans 2026, make sure to place your order by:
22 May 2026, midnight.

After that, we can’t guarantee production and delivery before the event.

Don’t leave it to the last beat. Order now and arrive at the start line fully prepared.

20/05/2026

Downwind sails may look simple from the outside.

But once they are flying, everything starts to change:
- the cloth stretches,
- the luff reacts to pressure,
- the leech opens.
The whole sail moves with the boat, the wind and the trimmer.

In our latest blog post, we share a closer look at our long-standing CFD-driven downwind sail design workflow, and how flying shape analysis, real-world validation, buildability and years of sailing feedback come together in the way we design high-performance sails.
Because true performance is not only about the shape we draw on screen. It is about the shape the sail takes when it is actually flying.

Racing at the F18 European Championship?
There are still a few days left to order your new sail in time for the event. Get in touch with us and let’s make sure your boat is ready to fly.

Read the full blogpost here:
https://www.onedesignsails.com/2026/05/20/how-we-design-downwind-sails/

1D – One Design Sails
High-performance sail design, built for real performance on the water.

19/05/2026

“The sails are perfect.”
That was Dany’s feedback after the 2018 Worlds.

And that is exactly the feeling you want before a major event:
confidence in your speed, confidence in your setup, confidence in your sails.

The European Championship is coming.
If you want to arrive with sails you can trust, talk to us.

1D - One Design Sails. Not a promise. Proven F18 performance.

18/05/2026

Great sails are not born overnight.
They are built through years of development, testing, racing, feedback and results.
This is why we are looking back at some of the key moments behind the Formula 18 sails, not for nostalgia, but because today’s sails are built on everything we have learned on the racecourse.

When you buy an F18 sail, you should not be buying a promise. You should be buying something that has already been proven.

For us, 2018 was one of those defining years, that was the year when the 1D – One Design Sails F18 concept showed exactly what it could do. That spring, we were deep in development: testing, changing, refining, listening to sailor feedback and pushing the decksweeper mainsail concept further and further. Not for a catalogue, not for marketing photos, but for real racing.

Then came the European Championship in Spain.
Dani Paschalidis and Kostas Trigonis won.
Mitch Booth and Ruben Booth finished third.
That was not just a good result, it was proof that the 1D F18 concept had serious speed at the highest level.

The even more important confirmation came later that year at the Worlds in Clearwater. Because a sail that is fast only in one condition is not enough. In Clearwater, the sail had to show range. It had to work in trickier, lighter moments too. It had to give the sailors speed, control and confidence when the conditions were no longer straightforward, and it did.

After the Worlds, Danny called and said the mainsail was perfect.
That matters, because today’s 1D F18 Pro line is not built from a new, untested idea. It comes from years of proven development, and 2018 was one of the moments when that foundation was clearly set.

If you are choosing your next F18 sail, choose one with a real history behind it.
A sail that has been tested.
A sail that has been refined.
A sail that has already won.
1D F18 sails are not just designed to be fast. They are proven fast.

This is the first chapter of the story behind our F18 Pro line.
Looking for your next F18 sail set?
Talk to us and choose the sailmaker with proven F18 performance.

01/05/2026