North Sails Viper 640 M-9 Mainsail

VIPER 640 M-9 MAINSAIL

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
FIND YOUR LOCAL LOFT
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.

VIEW GUIDE

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.

VIEW GUIDE

North Sails

MEET OUR

CLASS EXPERTS

North Sails
JACKSON BENVENUTTI
UNITED STATES
CONTACT
North Sails
CHARLIE CUMBLEY
UNITED KINGDOM
CONTACT
North Sails
AUSTIN POWERS
UNITED STATES
CONTACT
North Sails
MIKE MARSHALL
UNITED STATES
CONTACT
North Sails
JASON ANTILL
AUSTRALIA
CONTACT

#NSVICTORYLIST

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.

ALL RACE RESULTS

North Sails

SHOP APPAREL

Diseño ajustable

Pertex®, TW140S™

Pertex®, TW140S™

SoftShell+™, elástico

Clip de sujeción

+ 2

SoftShell+™

SoftShell+™, elástico

SoftShell+™, elástico

SoftShell+™

RELATED ARTICLES