Armstrong Midlength Mk II X-Form Foilboard

Designed for the Next Era of Foiling The Midlength Mk II marks the next step forward in Armstrong's board design, debuting our all-new X-Form Precision Molded Board Technology. Built to deliver a lighter, stronger, and more connected ride, it represents a major leap in durability, response, and long-term performance. Refined through years of testing in New Zealand's most demanding conditions, the Midlength Mk II blends Armstrong's signature feel with a new level of control, consistency, and confidence. Ideal for: Winging Parawinging Sizes: 38L – 4'8" x 18 1/8" x 3 1/4" 45L – 5'0" x 18 5/8" x 3 1/2" 55L – 5'4" x 19 1/8" x 4" 65L – 5'8" x 19 5/8" x 4 1/4" 75L – 6'0" x 20 3/8" x 4 3/8" 85L – 6'4" x 21 3/8" x 4 1/2" 100L – 6'8" x 22 1/4" x 4 7/8" 115L – 6'11" x 22 3/4" x 5 1/4" 130L – 7'2" x 23 1/4" x 5 5/8" Features: X-Form Precision Molded Board Technology Dual Carbon Stringer System Carbon Foil Tracks Forward Geometry Foil Track Foil Drive Compatible Window Surf Style Squash Tail Displacement Hull Raised Deck Wedges & Arch Bars Foot Strap Inserts New Deck Grip Inclusions: Premium Board Bag Construction: X-Form Precision Molded Board Technology From the beginning, Armstrong was built on a simple belief: riders should be able to trust their equipment in the harshest conditions, every day. X-Form was born from that same mindset. When existing manufacturing methods couldn't deliver the strength, precision, and durability we envisioned, we didn't compromise — we built our own purpose-designed factory. X-Form represents our commitment to doing things properly, using precision manufacturing to create boards that are stronger, more consistent, and built to progress with riders over time. Optimal Strength to Weight Ratio X-Form was developed to reduce weight while solving long-standing durability and consistency challenges. By eliminating the inconsistencies and long-term fatigue associated with traditional board construction, X-Form creates boards that are lighter, stronger, more durable, and more connected underfoot. The result is predictable performance, increased longevity, and a direct connection to the foil that riders can feel every session. Exact Form, Every Time X-Form is Armstrong's precision molded board technology and manufacturing process. Developed using proprietary CNC-machined molds, precision-engineered internal components, and advanced composite construction, every X-Form board is formed in a single molding cycle under uniform pressure and temperature. The process permanently locks in the board's rocker lines, rails, bevels, and contours while ensuring every internal component is aligned to exact tolerances. X-Form Benefits: More Direct Connection — The strength and precision of X-Form construction allow for a considerably thinner board profile, creating a more direct connection to the foil. The result is cleaner feedback underfoot, improved control, and a more responsive feel. Built to Last — Designed to withstand the demands of everyday progression, X-Form delivers a stronger, stiffer, and more durable construction than traditional methods. The precision molded process helps maintain the board's structural integrity over time, reducing softening and fatigue session after session. X-Form Features: Foil Assist Compatible Window — Clean, uninterrupted remote signal. Double Sandwich Foot Area — Complete PVC wrap of deck and underside with extra reinforced foot panels doubled up with high density PVC to handle the heaviest landings. High Density PVC Wrap — Entire internal surface wrapped in high density PVC. Even if it cracks, it won't absorb water like EPS foam would. High Density PVC Rails — Full perimeter PVC foam wrap protecting the areas most at risk of damage. Ultralight Large Sphere EPS Core — High-pressure molded layup is super stiff while the ultralight EPS core absorbs shocks for a solid and smooth ride. Dual Carbon Stringer System — Top-to-bottom dual carbon stringers provide maximum structural rigidity and durability by fully connecting the deck and bottom of the board. Carbon Foil Tracks — Proprietary carbon fiber foil tracks keyed directly into the stringer fibers for a fully integrated and ultra-strong construction where it counts most. Shape & Outline Balanced, Responsive, Predictable. The improved stiffness profile creates a clean, connected sensation underfoot, allowing riders to feel exactly what the foil is doing. The result is more confidence at speed, better control in critical moments, and a smoother, more intuitive riding experience across disciplines. Refined Profile — Thanks to the new X-Form construction, the refined profile features a considerably thinner board, delivering a more direct connection to the foil and reducing unwanted touch-downs. Optimized Volume Distribution — Maintains stability and balance while allowing the board to sit lower to the water, creating a cleaner, more responsive feel underfoot. Reduced Sticking & Tracking — The new bottom design features a refined double concave transitioning to a subtle V that generates early lift, making take-offs easier and more efficient while smoothing touch-downs. Shallower chines and a flatter bottom through the rear further reduce drag and resistance. Surf Style Squash Tail — Adds stability when getting onto the board, making early positioning and balance more intuitive. Allows the rails to remain more parallel for longer, increasing surface efficiency and helping generate speed quickly. Forward Geometry Foil Track — Armstrong's Forward Geometry concept, introduced in 2021, places the foil more centrally to reduce swing weight and increase responsiveness while remaining compatible with any foil system. FG foil tracks positioned further forward for enhanced maneuverability across all board sizes. Deck Grip The new Midlength Mk II deck grip is designed to reduce weight while increasing grip and control underfoot. Despite the lighter construction, it maintains Armstrong's signature soft feel, providing comfort and confidence for riders learning new skills, using Foil Assist, or spending extended sessions on an e-foil. Dual Foot Arch Bars — Intuitive foot positioning. Rear Foot Wedges — Intuitive foot positioning relative to mast position. Foil Track Indicators — For foot positioning relative to mast position. Triangle Cut Outs — Reduce weight and increase grip.