Technological advances in glass fiber fabrics for reinforcement in composites includes various glass compositions, filament diameters, and weave patterns, all of which influence composite properties. Although borosilicte ″E″ glass is the most widely used glass fiber, other compositions such as ″S″ glass fibers and ″D″ glass fibers have found limited use. Fiber drawing technology has resulted in a capability of producing large bundles of filaments as well as ultra-fine filament diameters. These new glass fiber compositions and filament diameters, combined with new coupling agent technology, have led to expanded fabric design capability with unique properties and potential applications.