NEW! 3Di 760m / 780m Composite Foil Sails
The ultimate in performance & durability for small-to-medium sailboats




North’s new 3Di 760m and 780m sails take the world’s fastest and most durable performance sail technology and tune it for small-to-medium sized sailboats. They delivers all the 3Di punch you’d expect,but are easier to handle, easier to trim and easier on your wallet.

North’s unique, patented 3Di process produces balanced load bearing and shapeholding approaching that of a rigid airfoil. Pre-impregnated spread-filament tapes are arranged in multiple axes to form a membrane and then thermoformed on a 3-dimensional (3DL) mold.

3Di 760m Construction
  • Black Aramid / Dyneema spread filament tape structure
  • Thermoformed on full-sized 3-dimensional (3DL) molds
  • Tape layout tailored for small-to-medium sized sailboats
3Di 780m Construction
  • Carbon / Black Aramid / Dyneema spread filament tape structure
  • Thermoformed on full-sized 3-dimensional (3DL) molds
  • Tape layout tailored for small-to-medium sized sailboats

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A spread filament tape is an individual yarn that has been spread out flat until the individual filaments lie side-by-side, forming an ultra-thin "tape." Shown above  is a pre-preg Carbon/Dyneema* spread filament tape measures a  mere 35 microns thick.
3Di Features - Mainsails and Headsails
  • Full-size 3-dimensional thermo-molded construction
  • Black Aramid/Dyneema composite foil (760m)
  • Carbon/Black Aramid/Dyneema composite foil (780m)
  • Loose-footed main with Integral Foot Skirt for shape and control
  • Luff customized to mast/boom or headstay system (except for custom luff cars)
  • Stainless steel round rings and Rutgerson press rings
  • RBS epoxy “E-glass” battens in internal pockets
  • Batten pockets with 3Di tie in closure
  • Mainsail cunningham adjustment
  • Telltales
  • Drawstring sailbag
  • Mainsails
    • Reefs
    • Water reefs
    • Reef keepers and flaking handles
    • Full length battens
    • Flutter battens
    • Leech battens
    • Overhead leech cord
    • Sail numbers
    • Country code
    • Insignia
    • Trim stripes/Glow Fast stripes
    • Photo and corner codes
    • Certified measurement
    • Custom, roll or zippered sausage bag
    Headsails
    • Telltale window
    • Leech, Full or VB+ vertical battens in any quantity or combination
    • Customized patches, pads and reinforcements
    • Spreader and stanchion patches
    • Soft hanks
    • Soft clew
    • North Clewboard
    • T-ring clew
    • Tack Snap Shackle
    • Sail numbers
    • Country code
    • Trim stripes/Glow Fast stripes
    • Photo and corner codes
    • Certified measurement
    • Roller reefing layout and patches
    • Rope Luff Reefing Pad and patches
    • Reef
    • UV protection
    • Custom, roll or zippered sausage bag
    NEW! 3Di 760m
    Aramid/ Dyneema
    composite foil


    NEW! 3Di 780m
    Carbon/Aramid/
    Dyneema
    composite foil

    » Other 3Di styles