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Mainsails

Viper 640 M-7 Mainsail

2018 Worlds

The M-7 mainsail was designed to compliment a simple tuning system that will help keep you up to speed in a variety of conditions. Chocking the mast in light air induces the proper amount of headstay sag; blocking the mast back and tensioning the lowers straightens the headstay for windier conditions, especially when vang sheeting. By optimizing the full length batten locations, we were able to maximize the sail's...

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Headsails

Viper 640 J-5 Aramid Jib

The new J-5 jib for the Viper 640 features the same proven winning shape as the J-4 jib. The new J-5 is made out of North Sails exclusive reinforced Xi14 Aramid laminate produced using the world’s most advanced sailcloth laminator and North's unique eXact™ process. The result is a high performance cloth with ultimate durability. Learn more about North NPL...

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Viper 640 J-4 Jib

2018 Worlds

Our redesigned Viper 640 jib has a lower clew so that the lead adjustment is more effective. We also added a full-length top batten, which gives you more  control with the jib sheet and the ability to trim harder. The entry is fuller and  leech flatter. And a max-length tapered bottom batten, plus additional panels in the head, increase durability.

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Spinnakers

Viper 640 V-2 Asymmetric Spinnaker

2018 Worlds

The North Viper 640 spinnaker reflects the knowledge we've gained by designing winning sails for a variety of sport boats. Our sail is sized to be class maximum and twists and rotates well, so you can sail lower angles while going the same speed or faster.

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Viper 640 Class Experts

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Zeke Horowitz

Annapolis, Maryland
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John Bowden

Charleston, South Carolina
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Mark Bradford

Brisbane, Australia
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Charlie Cumbley

Gosport, United Kingdom
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Ched Proctor

Milford, Connecticut
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Brian Janney

San Diego, California
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Jackson Benvenutti

New Orleans, Louisiana
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