With unidirectional fabric there are no gaps between fibers and those fibers lay flat. There is no cross-section weave that divides the fiber strength in half with another direction. This allows for a concentrated density of fibers that provide maximum longitudinal tensile potential. This directional strength property makes it an isotropic material, similar to wood.

Unidirectional fabrics are not appropriate for parts that require a great anisotropic strength (strength in all directions). Although during layup of a part, the unidirectional fabrics can be overlapped at varying angle orientations to achieve strength in multiple directions without sacrificing stiffness. 

ZERO® is a patented non-woven unidirectional fabric with a relatively small percentage of binder material (less than 3%). The binder is applied to only one side of the fabric resulting in virtually no crimp in the reinforcement fibers. 

*When purchasing multiple yards of the same fabric you will receive one continuous length of that material. It will be rolled, covered in plastic, and shipped in a cardboard tube to keep the fabric in its first quality condition.