The Naish Wingfoil Alana foil board is the same contruction as the premium Ultra carbon in colour hawaiian colourway. These foil boards are a bargain at thier clearance price 

Here's what Naish have to say:

Naish Wingfoil Alana (Carbon Ultra)
Limited edition 75L
New boards on clearance deal
 
SIZES: 75 | 
With the ever expanding popularity of wing foiling, we’re expanding the range to include an additional color scheme, in our classic Alana theme.
This limited range of boards is perfectly suited for wing surfing, or to be used as a SUP foil board, SUP downwind foil board or prone foil surf. Changes to this updated model include a more overall rail curve in the outline, slightly narrower tails, increased nose rocker, and more pronounced bottom shaping and concave. Multiple foot strap insert positions, including wider stance options, give riders the opportunity to choose between a windsurfing style, double front strap setup, or a single surf style setup. The rocker is perfectly balanced so the board flies smoothly parallel to the water surface. Track boxes have been moved further back to better match with the multitude of different foils that riders may pair with the boards. The increased tail kick behind foil boxes combined with the beveled rail guarantees easy take odds and sufficient clearance in turns.
The carbon ultra layup, which now includes extra rail cap reinforcements and Kevlar patches when in high-stress areas gives these boards the lightweight edge minimizing swing weight and enhancing overall performance.