If you don't know how to use it, don't buy it. There are no instructions on how to use this case. Things are thrown in a box and I initially missed the lid, lock and storage bag. But in the end I found these articles. But I couldn't find any instructions. Having never lived in the snow or grown up on car roofs, I don't know exactly how to do that. It was quite expensive for me to do further research on how to use it. I just send it back instead. I unpacked it but it's not clear where to tie it etc.
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