This item is made of 210T woven polyester material, which is water-resistant.
And it has strong elastic bottom hem, for wind proof.
This item has another feature for wind proof: it has SIX loops sewed at the bottom, you can find a rope to tighten the bottom.

Item specification:
1, Material: 210T Woven polyester with PU coating, water-resistant.
2, Color: Silver
3, Size: 
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For Sedan and Hatch Back:455*175*150cm, Fit Sedan cars including Hyundai I30,Honda Civic,Ford Focus,etc.. 
For Sedan:505*180*150cm, Fit Sedan cars including Nissan Altima,Ford Fusion,Hyundai Sonata,Mercedes-Benz C-Class,etc..
For SUV:510*180*150cm, Fit SUV including BMW X5/X6,Lexus GX/LX/RX,Toyota Highland,etc..
PS: You can measure your car to get the detail length/width/height data and choose the cover which fit your car.
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4, Elastic bottom hem. And it has SIX loops sewed at the bottom, you can find a rope to tighten the bottom.
5, Double stitching(Sewing), which is more durable than one line stitching.
6, A same material bag free of charge.