Matrix 300 Fibers are premium, fibrillated micro synthetic reinforcing fibers manufactured from100% virgin homopolymer polypropylene. Designed for use in concrete and cement base materials, Matrix 300 Fibers create a multidirectional reinforcing network that helps minimize concrete shrinkage cracking while improving the durability and performance of hardened concrete. Unlike chemical add mixtures, Matrix 300 Fibers provide mechanical reinforcement without affecting the hydration or curing process and do not absorb mixing water.