75 Years of crafting the best cruising sails

The Full Square Head

Why choose a full square head mainsail?

Challenge

  • Your multihull feels underpowered
  • You may also want to race

Result

  • Top performance
  • More power even when reefed down
  • Higher off-wind efficiency
Catamarn Full Square Head Mainsail
Full Square Head Mainsail

May we introduce

The Full Square Head Mainsail

The full square head mainsail takes the concept of the large or max-roach mainsail to its logical conclusion. This type of sail is common on most Grand Prix racing yachts, offshore or inshore, where only performance counts. This type of sail delivers flexible power, increasing sail area and power in the top third of the mainsail but feathering away to leeward when a gust hits, instantly de-powering the main. The advanced sail design takes full advantage of the long traveler on the wide catamaran base.

For the average family or cruising sailor, this sail can be a handful to handle. The top and diagonal battens needed to support the square top are inconvenient and impractical when lowering and stowing the sail on the boom, unless a system for detaching the head of the sail from the mast is fitted. For professional offshore racing, this obviously is irrelevant as the main stays up the entire duration of the race, no matter how long it may be.

What's in the box?

Standard Specifications

Optional

lagoon dacron heavy sail with twinply leech
Your sail will be carefully designed, inspected, packaged, and shipped.

Compare Our Multihull Sails

Material
Premium Dacron
Performance
75%
Durability
90%
Price
$$
Colors
Material
Premium Dacron, Hybrid Dynema
Performance
80%
Durability
80%
Price
$$$
Colors

Full Square Head Mainsail

Catamarn Full Square Head Mainsail
Material
Premium Dacron, Hybrid Dynema
Performance
85%
Durability
70%
Price
$$$$
Colors
Material
Premium Dacron
Performance
75%
Durability
90%
Price
$$
Colors
Material
Premium Dacron, Laminate
Performance
85%
Durability
80%
Price
$$$
Colors
Sunset sailing
Clark Beam
Rated 5 out of 5
Can’t wait for the new sails to arrive to keep us moving fast

I have used several sails from Rolly Tasker and was always pleased with their construction and performance. Our main and jib for our Lagoon 440 Cat (tall rig) are well-constructed offshore capable sails. Excellent reinforcement and hand sewn chafe leathers. And the sails are priced well below many other options. 60,000 miles later, the mainsail has done its job. Probably could have gotten many more miles out of it if we didn’t sail quite so aggressively. We have had our cruising Cat at speeds in the mid to upper teens, with our top speed of 19.2 knots in 30+kts. I ordered the same sail again and can’t wait for it to arrive. The jib is still performing well, and I expect it will go another 10,000 miles.

Choose your Sail

Required Measurements

mainsail measuring form
Download Mainsail Form PDF

This is how it’s done

Buying New Sails has Never Been Easier
1 Full Square Head Mainsail

Choose your sails and get a quote

Fill in the form as far as you like, hit send and get the ball rolling.

2 Full Square Head Mainsail

We contact you within a few weekdays

To answer all your questions and advise you on your individual sail. You will then also get your final quote.

3 Full Square Head Mainsail

We deliver your new sail swiftly

Depending on your location and time of ordering, you will receive your new sails within a few weeks.

4 Full Square Head Mainsail

Just enjoy
your sailing!

Hoist your brand-new sails and enjoy a whole new sailing experience.

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