SQUARE TOP CRUISING MAINSAIL

High Performance Profile

Square Top Mainsails, our most advanced model, dominate Grand Prix racing worldwide. The square top profile provides highly efficient progressive twist, reduced mast tip vortex and optimized sail area distribution. North designers precisely balance sail camber with head width while accounting for specific mast bend characteristics and target sailing conditions. All sail elements work together, including membrane modulus, batten stiffness, and batten configuration – resulting in finely controlled airfoil performance.

1 | 3Di ENDURANCE / White | North Sails Square Top Cruising Mainsail 3Di ENDURANCE White
material: 3Di ENDURANCE
Learn more about this materials
color: White
Selected | 
White , 3di endurance
1 | 3Di ENDURANCE / White | North Sails Square Top Cruising Mainsail 3Di ENDURANCE White
1 | 3Di ENDURANCE / White | North Sails Square Top Cruising Mainsail 3Di ENDURANCE White
Standard features
  • Rule Optimized Roach Profile
  • Optimized Gaff Batten Angle
  • 1 or more Full Length Battens
  • RBS E-Glass Tapered Battens*
  • Exclusive Tie in Batten Adjusters
  • Hard Braid Luff Rope
  • Cunningham
  • Adjustable Leech and Foot Cords
  • Loose Foot with Integral Foot Shelf
  • Exclusive Teardrop Corner Reinforcements
  • Stainless Steel Rings
  • Racing Trim Stripes
  • Nylon Twist (Leech) Telltales
  • Yarn Flow (Horizontal) Telltales
  • Class Insignia
  • Sail Numbers and Country Code
  • Certified Measurement
  • Drawstring Sail Bag
Optional features
  • Reef Points
  • Carbon Battens
  • Simple Luff Slides
  • Custom Luff & Batten Car Systems
  • Overhead Leech Cord
  • Spreader Tip Patches
  • Custom Graphics
North Sails
  • 3Di ENDURANCE

    Durable performance x-over sails for competition and cruising

  • 3D

    Molded Sail Shape

  • 0% Film

    Eliminates the risk of delamination

North Sails
  • 3Di OCEAN

    Engineered for ultimate durability and extended cruising performance

  • 3D

    Smooth, Molded Sail Shape

  • 0% Film

    Eliminates the risk of delamination

North Sails
  • NPL SPORT

    The highest performance small boat and one design keelboat laminate sailcloth in the marketplace

  • eXact™

    Proprietary x-scrim reinforcement adds strength with minimal weight

  • 97%

    Made with recycled polyester film

North Sails
  • NPL TOUR

    High strength, UV resistance 2D cruising sails

  • eXactTM

    Proprietary x-scrim reinforcement adds strength with minimal weight

  • 97%

    Made with recycled polyester film

North Sails
  • ♻

    Alternative bio-based and recycled raw materials.

  • 45

    Developed for cruising boats up to 45ft

  • HM/SM

    Available in high modulus and standard modulus compositions

North Sails
  • NPC CROSS-CUT

    Easy Affordable Durability

  • #1

    North Sails is the leader for woven dacron sailcloth

  • AP

    For everyday use and all-purpose sailing

Material
3Di ENDURANCE Engineered to Last. Designed for Fast.
3Di OCEAN More miles and ocean adventures
NPL SPORT Highest Performance Laminate Race Sailcloth
NPL TOUR Sails for performance-minded coastal cruisers
NPL RENEW Sustainable Materials for Cruising Sailors
NPC CROSS-CUT Easy Affordable Durability
3Di ENDURANCE 3Di OCEAN NPL SPORT NPL TOUR NPL RENEW NPC CROSS-CUT
3Di ENDURANCE is the most rugged high-performance sail technology. These sails are around the world tested for longevity and reliability. Many 3Di Endurance sails have logged the equivalent of more than two circumnavigations and are still in service. If you’re buying sails for adventure racing or bluewater cruising, choose Endurance.
3Di OCEAN is the first cruising sailing cloth innovation since Dacron, and this sail technology is reshaping cruising performance. OCEAN exploits 3Di technology to deliver cruising features and benefits that transcend performance racing. If you’re buying sails for cruising and expect longevity and ease of use, OCEAN is for you.
NPL SPORT is woven by North Sails, and it’s 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.
NPL TOUR is the ultimate sailcloth for paneled cruising sails. Sails cut from NPL TOUR are highly resistant to chafe, fatigue, and UV. These cruising sails feature eXact reinforcement for superior shape holding. If you’re exploring options for paneled cruising sails, ask us about NPL TOUR.
RENEW, a North Panel Laminate, features alternative bio-based and recycled raw materials. Developed for cruising boats up to 45 ft, RENEW is the start of an important shift in sailmaking towards more sustainable materials that maintain the performance and longevity expected from North Sails.
NPC CROSS-CUT is a quality-leading dacron sailcloth for simple, easy sailing. Sails constructed with CROSS-CUT offer excellent shape holding through a wide range of conditions. Designed and constructed to the North Sail quality standards, CROSS-CUT strikes a balance of high quality and affordability. If you’re shopping for longevity and reasonable pricing, NPC CROSS-CUT is worth exploring.