These sunshades block 85-90% of the damaging UV rays.  They help protect you form the sun allowing you to enjoy those beautiful afternoons while you still retain your view. NOTE: Shipping charges will be added based on weight and destination.  If you are using PayPal there will be two charges on your credit card...one for the actual item and the second will be for shipping.  To be fair to our customers, we charge only actual costs to ship the item being purchased and therefore we are unable to give you and actual shipping costs until we know the item you are purchasing and your destination zip code.  If you like, email us with you destination zip code and the item your are interested in and we will be happy to give you the shipping costs.