They are made of high quality polyester, the front side is fashion sunset pattern design and the the back side is with silver PU coating with high function of sunlight reflecting back to outside. Both of them are able to be installed toward the interior windshield vertically or horizontally, it does not require any tools and not need any modifications, just unroll the sun shade,then put it under your windshield, don't forget to let the visors press them tightly, and it will keep in place, very easy installation & fast removal.