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The winning design of the KS3 is now joined with one of history's all time favorites the Spiderlock® from over 20 years ago!

Based off the KS3 size, shape and concept, this sail required no development other than totally new construction techniques developed by Jeff and the Maui team. The feeling is like surfing without a sail at all, but with turbo power on command.

The stunning thing about this version of the KS3 is you can see EVERYTHING all the time. The exclusively developed Spider UHMWPE web reinforced monofilm panel opens the whole wave into your view in beautiful clarity. This web also helps preserve the clarity of the monofilm as the film never rubs on itself when rolled up as the webbing is higher than the film.

Not only is the sail material new, but the batten system is completely revolutionary. The Interweave® batten system developed by Jeff Henderson eliminates 2/3s of the traditional batten pocket as you know it. Only the tapered section of the batten with the foil shape remains in a conventional pocket. The rest of the batten is woven from one side of the sail to the other to maintain shape and smoothness across the sail. Interweave® eliminates material, sand, dirt and water from the sail and is lighter.

With our lightweight OX Webbing sleeve that is nearly indestructible, even a broken mast in the sail will not damage this new .055 mm thick amazing fabric.

The KSSpider is the now the lightest and direct sail in our line, taking over from the KS3. The new construction not only reduces weight, but it has made reaction time much quicker and makes the sail respond instantly. It is also our best wave sail for larger sailors who now can use large size wave sails in heavy surf with no drawbacks.


Hard Core Wave
On-Shore Wave
Off Shore Wave
Soft Wave
Light Wind

KSSpider Sail Features

  • Jeffrey Henderson /Kauli Seadi design
  • Our lightest wave sail
  • Three full length battens with INTERWEAVE® batten pockets
  • Indestructible Ox Webbing UHMWPE luff sleeve
  • Huge SpiderLock® window with UHMWPE Spider webbing reinforcing
  • Unique "S" bend batten de-power and shape stability system
  • New easy roll sleeve top
  • Dimension "Flex" triple laminate luff top reinforcing
  • Technora® tack and clew reinforcing
  • Boom height markings printed inside and out the boom opening
  • Genuine sailmaker's leather chafe trim
  • Fully accessible mini-battens
  • Foot edge raised bead for maximum deck chafe resistance
  • Triple pulley downhaul in 316 Stainless and bronze
  • Ribbed EVA mast pad with 5cm wide hook and loop closure


Size Luff Boom Ideal Mast Battens Weight (LB) Weight (KG)
3.1 319 136 340 3 5.3 2.4
3.4 347 138 340 3 5.6 2.5
3.7 348 149 340 3 5.7 2.6
4.0 365 155 340 3 5.9 2.7
4.3 382 159 370 3 6.1 2.8
4.6 389 165 370 3 6.3 2.88
4.9 407 165 400 3 6.5 2.95
5.2 416 171 400 3 6.9 3.15
5.5 422 174 400 3 7.1 3.2
5.8 437 181 430 3 7.2 3.25
6.1 453 186 430 3 7.3 3.3
6.4 460 191 430 3 7.5 3.4
6.7 465 191 430 3 7.7 3.5