A board including a plurality of elongate members and first and second non-permeable first fiber reinforced material layers. Each of the plurality of elongate members are cooperatively positioned to form a perimeter of a polygon. The non-permeable first fiber reinforced material layer is secured to a top surface of the perimeter of the polygon. The non-permeable second fiber reinforced material layer is secured to a bottom surface opposing the top surface of the perimeter of the polygon. A void is defined within the perimeter of the polygon between the first fiber reinforced material layer and the second fiber reinforced material layer.