Sparkling Trends car window sun shade blocks over 90% of harmful UV Rays and have UPF 39+ sun protection. Our sun shades are tested to provide protection from sun glare and heat- This can protect your baby and passengers from skin irritation and bright sunlight. Unobstructed full clear outside view for better driving. ZIPPER DESIGN: Zipper Design for Front Side Windows adds to ease of use without removing the magnetic sunshade. FULL FUNCTIONALITY: You can open and close the zip as per your requirement for the front windows. Our sunshades are manufactured using precise calculations for Solar Heat Gain coefficient. A very small amount of heat is absorbed and the rest is radiated away, keeping the car cool. Our window curtains are effective in radiating away harmful rays as well.