We have different weight for Polyster Car Covers, such as 170T or 190T Polyster Car Covers, 210D Polyster Car Covers,etc.We can also produce the Polyster Car Covers in different colors,such as blue & silver,etc. The Polyster Car Covers are not waterproof. It can just protect your car from snow,dusts,bird drops & scratch,etc. But the Polyster Car Covers are easily to be folded or unfolded. Since it's coming with light weight and the air is easily to go outside. We normally package the Polyster Car Covers with same material storage bag. If you want, we can also package it with vacuum packing to save the space. One 40HQ can hold much more pieces of vacuum packing car covers than normal packages. So it can help you save shipping cost.