Auto Drive Super Jumbo Double Rings Fit on RV and Trunk Windshield Twist Sunshade 1 Pack, 67 * 39 '', is especially designed for vehicles with extra large front windshields which size is about length in 67" (170 cm)  and width in 39" (99 cm), such as RV, truck and bus etc . It is consist of  two exactly same size rings sewed with durable material of polyester with silver PU coating, it is able to cove a full size of windshield to block sunlight and harmful UV rays from outside to inside of your car, highly decreased the risk of damage and color fading to your car interior stuff like steer wheel, dash board, console and car seats, and provides cool temperature for car interior when you park your car outside for long time in hot days. It is very easy to install in your car, just releasing the whole product against the inside windshield in any side, and press the two visors on it, it get started on work. Please remove it from the windshield when you start your car, and just fold it into a very small round compact and put it on anywhere you prefer, it will not occupy much storage room as it is in small package and light weight, don't worry about the twist method, you will find very clear learning video in this site, we are get ready everything for you here to save your worries! When you need a really big car sunshade to protect well your car interior and expecting a pleasant car ride, please don't hesitate to purchase our item and enjoy the convenience and happy it bring to you!