RoofBag 100% Waterproof, Made in USA, Premium Triple Seal for Maximum Protection, 2 Year Warranty, Fits ALL Cars: With Side Rails, Cross Bars or No Rack, Roof Bag includes Heavy Duty Straps Works on bare roof, cross bars, side rails, or baskets - Easy to install - Easy to store. 100% waterproof, electrically sealed, no exposed stitching- heavy-duty construction, and set of 3,000 lbs-strong Seatbelt-Style Straps that secure carrier to any car, at any highway speed. Made in the USA, same day shipping (business days before 2:30 PM), 2-year manufacturer warranty. Size 11 fits any car, SUV or van. Size 15 fits SUVs, vans and full-size sedans Comes with everything you need, (no extra straps needed) - Highly recommended accessory: Protective Mat protects roof and keeps bag steady (available from RoofBag Amazon store).