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Doyle Sails proprietary sail membrane Stratis was developed in 2001 when Doyle Sails New Zealand realised that it was time for a new generation of sails. It was apparent that across the industry there was a need for lighter, longer lasting sails. From performance racing sails with higher durability to superyacht sails that required the physical structure of high modulus fibres to take the huge loads that were generated, through to cruising yachts that simply wanted lighter sails that were easier to handle.

The Stratis plant is based at the 11,000 sqm Doyle Sails New Zealand production facility. The factory has two production tables with multiple fibre laying machines and laminators on each production bed allowing a full range of sails to be produced from the smallest dinghies to the largest Superyachts.

By sailors, for sailors. 


The Stratis process starts with EVERY sail being structurally engineered with the appropriate fibre for the application of the sail. One of the big benefits of Stratis is its ability to laminate more fibre types than any of the other sailmakers. This ranges from our highest modulus Carbon through to our Polyester range for small cruising boats; there really is a fibre or fibre blend for every application.

The outside surface is chosen with the client, as Doyle has a huge selection of weights, colours and surfaces dependent on the type of sail and type of sailing the sail will be used for.

The key components when developing Stratis has been two-fold, firstly the quality of the lamination had to be unsurpassable. Doyle’s reputation has been built on its earliest catch phrase, “Better Engineered Sails” so Stratis needed to stand by that. Secondly, each sail is 100% designed and engineered for the customer's yacht and application. Every time the Stratis machine runs a path of fibres it’s entirely custom made to that sail.

We are continually developing our laminated sail products in terms of design, materials and manufacture. Our research department continues to experiment with new surfaces, fibres, adhesives and techniques with the aim of offering our clients the best possible product while our design department uses the latest computer technology and design tools to develop shapes and structures for faster and more innovative sails.



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The Stratis facility has three full time production floors across 11,000 sqm of floor space, capable of producing up to 3,000 sqm of custom Stratis sails each and every week.


When designing Stratis sails, the first part of the process is to select the surface type.

Once the surface is laid on the Stratis table, X-Ply yarns are laid to give the sail a base layer of fibre as support before the primary yarns are laid on top. Primary yarns include Stratis 500 in Polyester, Stratis 800 in Technora or Stratis 1100 in Carbon Technora or Carbon ICE options.

Once the primary yarn structure is laid into the sail custom yarn layouts are laid to match internal detailing including internal batten pockets, looping for slides, looping for battens on the leech. Then the whole process begins again in reverse, with the remaining primary yarn layout being laid before a balance of support yarns, followed by the surface.

Once the sail has all of the fibres laid, the sail goes through a lamiantion process where it is heat sealed under 16 tonnes of pressure before being finished by the hands of our world class sailmakers.

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SURFACE: The outer layer of the sail is known as the surface of the sail. Surface options are available in Taffeta and/or Film options depending on the required use for that specific sail.

X-PLY YARNS: These are yarns that are laid prior to and in support of the primary yarn group.

PRIMARY YARNS: These Stratis 500, Stratis 800 and Stratis 1100 fibres are laid in custom groups, tailored to where your sail sees load, for example fibre concentration in corners of the sail can be seen to the right.

INTERNAL STRUCTURE: The internal structure yarns are laid in areas that see more load. Where reinforcement and pockets are typically seen on the outside of the sails, Doyle Sails includes these internally. For example internal batten pockets, looping for slides, looping for battens and luff, leech and foot yarns are all added internally to the sail.


Request a quote for your sails or simply get in touch with your local Doyle Sails expert. 


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