The main objective of this project is to develop a composite made of two different materials which is reinforced with polyester resin respectively. First is coi short fiber i.e. coconut coir fiber which is light in weight and posses good mechanical properties, and the other one is coir short fiber with calcium carbonate as filler with polyester i.e. calcium carbonate which is good at water absorption and increases the flexural strength ,heat resistant and also posses good mechanical properties. After curing these fabrics are conducted with various tests like Tensile, Impact, Flexural and shear tests. Finally the material with better properties and results is selected and used in commercial,automotive and building and household applications.