The Sail for All Downwind Conditions
OneSails DAME 2025 logoPresenting the IFS Multi Tradewind Sail
Winner of the 2025 DAME Design Awards.

© Ph. Ugo Fonollá

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Performance
longevity
sustainability
4T FORTE
The Next Generation of Sails
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Logo 4T forte technology

Introducing the first
sustainable hiGH-performancE sails

4T FORTE™ are the “green sails”, delivering high-performance solutions for racing and cruising with minimal environmental impact. Membranes and their assembly are engineered to the highest standards of sustainability, replacing glues, resins, and solvents with advanced heat fusion technology. The base polymer is 100% recyclable through standard waste separation, setting a new benchmark for responsible sailmaking.

1.

MANUFACTURING PLANT

Holds to the highest standards of environmental practices and the responsible sourcing of materials and energy sources.

2.

PRODUCTION

Sails made of 4T FORTE are produced with a low level of CO2 emissions into the atmosphere and without the use of pollutants such as glues, resins and solvents.

3.

DISPOSAL

At the end of their useful life, these sails are recycled within the normal recovery processes of polyethylene-based raw materials to generate the PE pellet.

4.

RECOVERY

The polyethylene pellet is used for the production of accessories (such as headboards) to be used in the production of new sails.

OneSails composite Sail membranes

THE SUPERIOR STRUCTURAL INTEGRITY OF CONTINUOUS YARN COMPOSITE TECHNOLOGY

A core structural grid of high-modulus fibres manages primary loads, while precisely oriented micro-layers reinforce strength across secondary directions. Encapsulated between advanced ripstop shields, the structure is engineered to resist UV exposure, moisture, and mildew.

Racing and
Grand Prix sails

Cruising and Performance Cruising sails

This OneSails range is designed specifically for cruising, for owners seeking the optimal balance of performance, durability, and aesthetics.

Cruising and Performance Cruising sails ​
Super and Mega Yachts Sails​

Super and Mega Yachts Sails

OneSails is the only sailmaker in the world with technology capable of producing sails of unlimited size in a single, seamless structure using continuous yarns—ensuring superior load distribution and durability for superyacht and megayacht applications.

Classic and Spirit of Tradition yacht sails

Our sails are distinguished by the precision and care applied to every detail of their finishing. With access to custom fittings and an extensive archive of classic yacht data, we design and build Classic Yacht sails that preserve the authentic feel and timeless character of traditional craft.

Classic and Spirit of Tradition yacht sails

Downwind Sails

Downwind sails are currently seeing the most significant development. With advances in fabrics and sailmaking technology, they deliver greater efficiency downwind while maintaining performance at apparent wind angles as tight as 45°.

Racing symmetric and asymmetric spinnakers

OneSails make a broad range of hi-performance spinnakers for racing boats. The design of every spinnaker is customized for the boat in order to give truly superior performance.

Furling IFS™ cableless downwind sails

IFS™ sails are designed to incorporate a net of continuous structural fibres, laid directly on to the sail’s luff, effectively replacing the cable. The advantages of this technology are considerable. A wider range of sail shapes can be set and furled with sail handling eased by the reduction in weight.

Cruising symmetric and asymmetric spinnakers

The gennakers by OneSails are designed for a wide range of apparent wind angle to avoid a continuous trimming during sailing. The Sails are controlled with fluid dynamic software simulations and optimized with the boat dimensions to get easy hoist and dip.

To meet the needs of the demanding One Design sailors, OneSails offers competitive sails for a wide variety of class. Our sails are not in stock but produced at the time of the delivery in order to include the last developments in design and fabrics.

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One Design

OneSails, the global sailmaking brand known for advanced sail design and sustainable innovation, today announces the launch of the 4T FORTE Trade-In Campaign, the first industry initiative allowing sailors to return used sails for recycling while receiving a benefit toward the purchase of new ones.
José Ballester and Andrés Manresa win the 2026 ORC Double-Handed European Championship (Class B) and overall victory at the 200 Millas A2 offshore race in Altea sailing Falapouco with OneSails.
The Optimist class is the foundation of youth sailing worldwide. Discover the 2026 Optimist sailing calendar, featuring World and Continental Championships and major international Optimist regattas, and plan the season for young sailors and teams.

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