Because the buckles are rust - proof .
The straps are made of a strong UV - treated and tested webbing , you can leave the rack system on your car roof and be confident that they 'll survive long days in the sun .
Because the buckles are rust - proof and the straps are made of a strong UV - treated and tested webbing , you can leave the rack system on your car roof and be confident that they 'll survive long days in the sun .