Woven roving is a heavy, coarse plain weave fabric. Bundles of roving are woven together loosely at 90 degrees. The input rovings are designed to give a controlled wet-out with excellent laminate properties. The construction gives a bi-directional (0º/90º) reinforcement and the strength of continuous filaments. It is good for flat surfaces. Woven roving is typically layered with fiberglass mat (chopped strand mat).