Polymer composites that are composed of synthetic resources are toxic and non-biodegradable. Additionally, they contain petroleum-grounded resources, which are greatly detrimental to both humans and the environment. The aim of the study is to assess the characterization and development of polymer composites reinforced with natural fibers. Chemical and thermal characterization (FTIR spectroscopy, XRD analysis, and TGA) were conducted, along with physical aspects (density, vacancy %, and moisture absorption behaviour). The actual density of the bio-Comp. and hybrid Comp.s that were developed was assessed utilising the Archimedes principle-grounded water immersion method. After water immersion, the jute/hemp/epoxy Comp. exhibited a glass transition temp. of 76.2 0C, which is the fourth greatest value were made. The jute/hemp/flax/epoxy hybrid Comp. that was water-saturated attained the lowest value of tan δ (0.401). The mechanical properties of the majority of NFs are satisfactory; however, they are inferior to those of synthetic fibres. Natural fibres, including flax, hemp, jute, has great specific strength and rigidity.