The tarpauline is made from a special industrial grade material which will prevent holes and tears. The Spikes are made from ABS material that protects it from UV sun light. The fitting mechanism allows it to hold its position in high winds or in storms. No scratch on car, waterproof , corrosion proof, not torn easily.Cover Can be removed and re-fixed in a minute Size - 60 inch x 36 inch Top (5ftx3ft) and 40 inch x 24 inch Bonnet ( 3.30 ft. x2ft)