This is a test of commonsense. Complete the next sentence:

How to tie down a kayak
Get padding for your roof rack.
Padding will prevent your roof rack from damaging your kayak during your drive. You can use padding blocks that sit on top of the roof rack bars, or you can use padding that wraps around and velcro over the bars.
You can find roof rack padding online or at your local sporting goods store. Get kayak straps with cam buckles.