Mariner · 31 ft · masthead sloop
Mariner 31 sails
Every sail for the Mariner 31 on one page. Fixed prices on cruising sails you can buy today, racing sails by quote, and the upgrades that matter offshore. All sized to the Mariner 31 rig.
Luff (P) 8.72 mFoot (E) 3.63 mFore triangle (I) 10.61 mBase (J) 3.78 mLength 9.45 m
CruiseBuy cruising sailsMainsail and furling genoa in Dimension-Polyant Dacron, fixed price, built in about 4 weeks.From A$2,387See cruising sailsRaceRacing sailsFilm laminates and membranes designed for this boat and how you race.By quoteGet a racing quoteAdventureGo offshoreHydranet for long passages, heavier cloth, a third reef and storm sails sized to this rig.Storm jib from A$461Plan a passage wardrobe
Cruising sails
Fixed price. Add to cart.
Made to measure for the Mariner 31 in named Dimension-Polyant cloth. Pick the cloth and options, check out, and we confirm your measurements before anything is cut.
Furling genoa
Size (LP)
130% recommended from the standard rig measurements.
UV cover colour
A$2,811A$ including GST
Main and 130% genoa together: A$5,335 in Dimension-Polyant Optimum Cruise. Add both to the cart and they ship together.
Build timeStandard about 4 weeks. Express about 2 weeks (+8%), economy about 8 weeks (5.5% off).
Sail numbersOptional, 380 mm letters for this boat, priced per character when you order.
Fit checkWe send a short measurement check after you order and confirm before cutting.
12-month warrantyOn top of your rights under Australian Consumer Law. Shipped worldwide.
Also sized to your rig
Asymmetric spinnakerSize 3, 50 m², 10.8 m luff. Cruising nylon in 11 colours.A$1,779Dousing sockSized to the spinnaker luff. Pick your tube colours.Added with the spinnakerStorm jibUp to 5.6 m² with a luff up to 6.9 m. High visibility orange.From A$461TrysailUp to 5.5 m². Slides, slugs or grommets to suit your track.From A$740
Who's making your sail
Real sailors.
A real loft in Geelong.
Every Kraken sail is designed from your boat’s own measurements by a designer who still races at international level, and built in cloth made in Europe or America. Before anything is cut, Christie or Ryan checks your numbers and talks to you about how you sail your Mariner 31. That conversation is where a good sail becomes the right one.
Questions about the Mariner 31? Email sales@krakensails.com and you’ll hear back from one of us, not a call centre. Read our story
Rudder Cup 2026
Toecutter, on Kraken sails, wins AMS and PHS in Australia’s oldest ocean race.
Sailing with Phoenix
Oregon to Hawaii singlehanded. On day 11 the rudder went and the sails flogged for four hours in 25 knots. “The sails held.” Read the story
Racing sails
Racing sails by quote.
We design racing sails for the Mariner 31 to order, in film laminates and membranes. Tell us how you race and a sailmaker sends you a quote and sail plan.
Two-year warranty on racing sails. Build time is about 4 weeks for laminates and 6 for membranes, delivered worldwide.
Get a racing quoteAdventure and offshore
Plan a passage wardrobeSails for the long way round.
Passage making asks more of a sail: weeks on the boom, sun and chafe, and a third reef when it blows. Here is how the Mariner 31 wardrobe changes when you leave the coast.
Coastal and weekend
Optimum Cruise
Dimension-Polyant's cruising Dacron and our best value.
- Mainsail
- A$2,525
- Genoa 130%
- A$2,811
Works hard, holds shape
C-Breeze
Tighter weave of higher tenacity fibres. Resists stretch and lasts longer.
- Mainsail
- A$3,196
- Genoa 130%
- A$3,603
Bluewater and expedition
Hydranet Radial
Dimension-Polyant's offshore cloth, woven with Dyneema, with panels that follow the loads. Built for ocean miles.
- Mainsail
- A$7,095
- Genoa 130%
- A$8,377
Third reef and offshore buildThird reef, heavier patches and chafe protection. Added in your passage quote.Quoted with your wardrobeStorm jib and trysailSized to this rig under the offshore safety rules: jib to 5.6 m², trysail to 5.5 m².From A$461Passage storiesOregon to Hawaii single-handed, a Tahiti delivery, Melbourne to Osaka.Read the case studies
Hydranet and offshore builds go through a short quote so we can talk through your passage. Catalogue sails carry a 12-month warranty; custom and racing sails carry two years.
A real loft in GeelongSails designed by Kraken sailmakers who race and cross oceans themselves.
Named cloth onlyEvery price names the exact Dimension-Polyant cloth and weight.
Australian Consumer LawWarranty on top of your consumer rights, from an Australian company.
Delivered anywhereExpress to Australia, the US and worldwide, with US import duty prepaid.
Rig and sizes
Mariner 31 rig
These are the published rig dimensions. Boats change over the years, so we check your own measurements before we build, and tell you before design starts if a change moves the price.
| Mainsail luff (P) | 8.72 m |
|---|---|
| Mainsail foot (E) | 3.63 m |
| Fore triangle height (I) | 10.61 m |
| Fore triangle base (J) | 3.78 m |
| Mainsail area | about 18.5 m² |
| Genoa 130% area | about 26.1 m² |
| Length overall | 9.45 m |
| Rig | Masthead sloop |
Questions about Mariner 31 sails
How much is a new mainsail for a Mariner 31?
From A$2,387 (US$1,375 in the US) in Dimension-Polyant Optimum Cruise with a full head batten and three leech battens, or A$2,525 with four full battens. C-Breeze costs more.
What size genoa does a Mariner 31 need?
Going by the standard rig measurements, a 130% genoa (about 26.1 m² on this boat) suits this boat. Choose 110 to 120% for windy places or easier tacking, or 140 to 150% for light air. A 130% genoa in Optimum Cruise is A$2,811 (US$1,615 in the US).
Can I race in cruising sails?
Yes, plenty of club racers do. If results matter, a laminate main and headsails hold their shape far longer: ask us for a racing quote.
How long does it take?
Cruising sails take about 4 weeks to build, then ship express. Racing laminates take about 4 weeks and membranes about 6 once the design is signed off.
Do the prices include GST and shipping?
A$ prices include GST. US$ prices are before local taxes and duties. Shipping is added at checkout: A$75 in Australia, about US$75 plus duty prepaid to the US.
A$ prices include GST. As a proudly Australian company we keep our tax here, and Australian businesses paying their tax help support Australian sport. US$ prices are before local taxes and duties.