North Sails Viper 640 M-9 Mainsail

VIPER 640 M-9 MAINSAIL

$4,857.60
All-Purpose | Aramid

With the same shape and twist profile as the M8, the M9 introduces a high-tech aramid fiber layout inside the laminate film. Aramid is a stronger fiber so not only will this 2019 World Championship winning sail give you an advantage in durability, it will stretch less in big breeze and when you wail on your control lines - making the sail more controllable.

Championships

North American | National

color: Gray

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North Sails
ONE DESIGN LAMINATE
North Paneled laminates are woven by North Sails, and are the market’s highest-performance 2D laminate race sailcloth. A proprietary polyester resin system resists heat, water, and UV at a level unmatched by any string sail. Sails cut from NPL are significantly stronger, lower stretch, and lighter than competitor brands.
Standard features
  • Full Battens
  • Leech Battens
  • Country Code
  • Sail Numbers
  • Trim Stripes
  • Insignia
  • Cunningham
  • Visibility Window
  • Roll Bag
  • Mainsail Spreader Tip Patches

POWER UP

VIPER 640 SPEED GUIDE

Dive into the North Sails Viper 640 Speed Guide—your essential companion for mastering speed, tactics, and winning strategies.

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North Sails

SAIL FAST

VIPER 640 TUNING GUIDE

The North Sails Viper 640 Tuning Guide is a resource for class sailors aiming to optimize their performance on the racecourse. Packed with expert advice and detailed instructions, this guide covers rig setup, sail trim, and tuning techniques, helping you unlock your Viper's full potential.

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North Sails

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CLASS EXPERTS

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EARN THE WIN

North Sails wins more races than any other sailmaker because of their relentless commitment to innovation, technology, and performance. With a team of expert designers, engineers, and sailors, North Sails is constantly pushing the boundaries of what is possible in sailing.

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SHOP APPAREL

hover | Ocean blue | 27M718_0790_psfront1
hover | Phantom | 27M718_0951_psfront1
Trucker Cap $54.55$68.19

Adjustable fit

hover | Fiery red | gp-aero-waterproof-jacket-27m065
1 | Ocean blue | gp-aero-waterproof-jacket-27m065
hover | Phantom | gp-aero-waterproof-jacket-27m065
GP Aero Waterproof Jacket $418.17$522.73

Pertex®, TW140S™

1 | Ocean blue | gp-waterproof-shorts-27m565
hover | Phantom | gp-waterproof-shorts-27m565
GP Waterproof Shorts $321.22$401.52

Pertex®, TW140S™

hover | Ocean blue | race-softshell%2B%E2%84%A2-hoody-27m300
hover | Phantom | race-softshell%2B%E2%84%A2-hoody-27m300
Race SoftShell+™ Hoody $136.36$227.28

SoftShell+™, Stretch

hover | White | fast-dry-cap-27m713
hover | Sulphur spring | fast-dry-cap-27m713
hover | Ocean blue | fast-dry-cap-27m713
hover | Navy blue | fast-dry-cap-27m713
+ 3
Fast Dry Cap $48.49$60.60

With retainer clip

hover | Ocean blue | race-softshell%2B%E2%84%A2-jacket-27m035
hover | Navy blue | race-softshell%2B%E2%84%A2-jacket-27m035
hover | Titanium | race-softshell%2B%E2%84%A2-jacket-27m035
hover | Phantom | race-softshell%2B%E2%84%A2-jacket-27m035
+ 1
Race SoftShell+™ Jacket $206.07$257.59

SoftShell+™

hover | Navy blue | race-softshell%2B%E2%84%A2-jacket-fw-27w035
hover | Ocean blue | race-softshell%2B%E2%84%A2-jacket-fw-27w035
hover | Titanium | race-softshell%2B%E2%84%A2-jacket-fw-27w035
hover | Phantom | race-softshell%2B%E2%84%A2-jacket-fw-27w035
+ 1
Race SoftShell+™ Jacket FW $206.07$257.59

SoftShell+™, Stretch

hover | Titanium | race-softshell%2B%E2%84%A2-vest-fw-27w038
hover | Ocean blue | race-softshell%2B%E2%84%A2-vest-fw-27w038
hover | Navy blue | race-softshell%2B%E2%84%A2-vest-fw-27w038
hover | Phantom | race-softshell%2B%E2%84%A2-vest-fw-27w038
+ 1
Race SoftShell+™ Vest FW $169.70$212.14

SoftShell+™, Stretch

1 | Ocean blue | race-softshell%2B%E2%84%A2-vest-27m038
hover | Navy blue | race-softshell%2B%E2%84%A2-vest-27m038
hover | Titanium | race-softshell%2B%E2%84%A2-vest-27m038
hover | Phantom | race-softshell%2B%E2%84%A2-vest-27m038
+ 1
Race SoftShell+™ Vest $169.70$212.14

SoftShell+™

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