Plastic is a synthetic material that can made into almost any shape. Plastic is commonly found in water bottles and bags that tend to be very flimsy. However, when you add a glass fiber reinforcement this already great material becomes stronger than some metals. The strength-to weight ratio of Fiberglass Reinforced Plastic compared to metal or wood products can be up to 5 times bigger. The fiberglass strength is maintained due to the fact that the fibers carry the load while the resin distributes the weight throughout the composite parts as required.