Abstract-Fibers are of two types: natural fiber, which consists of animal and plant fibers, and man-made fiber, which consists of synthetic fibers and regenerated fibers. Natural fibers have been used to reinforce materials for over thousands of years in so many forms. In recent years, natural fibers reinforced composites have received much attention because of their lightweight, nonabrasive, combustible, nontoxic, low cost and biodegradable properties. Many types of natural fibers have been investigated for use in plastics including flax, hemp, jute, sisal and banana. A lot of research work has been performed all over the world on the use of natural fibers as a reinforcing material for the preparation of various types of composites. Unlike carbon and glass fibers, natural fibers are abundantly available from renewable resources. In terms of cost, natural fibers are cheaper than the synthetic alternatives. This paper deals with properties of natural fibers based on bast (jute), leaf (sisal), grass (bamboo) at different conditions. In today's scenario being biodegradable, natural fibers have much importance in environmental friendly composites.