It blocks 90% of UV rays and is mold and mildew resistant.
Brad's Deals Editor Candace,
Get these 4'x6' Castlecreek Sunscreen Roll-Up Window Shades for $29.99 at Sportsman's Guide. Plus, activate this free 3-Month Buyer's Club Trial Membership and enter the coupon code BRADSHIP at checkout to drop the price further to $26.99 and get free shipping. This is the lowest price we could find for comparable shades by $17. These shades are made of polyethylene which helps it resist weather and fading, and are available in three color choices. It blocks 90% of UV rays and is mold and mildew resistant. It is also available in a 6'x6' size for $35.99 or a 8'x6' size for $44.99. There's no sales tax (except MN and CA).