Reflective cracking is one of the major distresses found in asphalt overlays. Bituminous materials are weak under tensile or shear loading. Due to repeated loading as well as due to varying climatic conditions, the cracks and joints in the existing pavements reflect to the overlay. The introduction of a reinforcing material which has good tensile and interactive properties improves the performance of the bituminous materials. Different types of interlayer materials are used between the old pavements and overlay to mitigate the reflection cracking. The geosynthetic reinforcement layers dominate the other materials due to the ease in installation and excellent performance in different climatic conditions. The bonding with the surrounding bituminous material is also an advantageous factor for the usage of geosynthetics. The bitumen treated geotextile layers also act as partial barrier against moisture propagation through the pavement layers thus improving the long term performance of the pavement. The natural geosynthetics can also play an important role in controlling the reflection cracking in flexible pavements. The coir and jute fibres have very high tenacity and affinity to bitumen. They are stable even at temperatures as high as 150 to 180°C making them suitable for pavement applications. With bitumen coating, their durability is increased as their exposure to degrading environment is partially cut off.