The Unifiber Maverick is not a windfoil sail per se, but its very light construction wit monofilm makes it a great choice for foiling, with a great value for money!
That's a sail for people starting windsurfing/windfoiling and who don't want to invest too much in a sail, but rather use the money in a good board and foil :-)
 
The complete sail is made of x-ply (fiber reinforced) monofilm. This makes the Maverick HD extra strong. The smaller sizes 4.0 / 4.5 / 5.1 / 5.8 are designed towards Bump & Jump conditions, the larger sizes 6.5 and 7.3 are designed for performance Freeride level blasting.
 
The relative low weight makes this sail easy to uphaul. Highly recommended to use in combination with the recommended mast to subtract maximum performance like early planning and upper end control.