Originally Posted by
Carbonfiberboy
We strap a waterproof compression sack to our rack top. But under it, we put a piece of ribbed rubber stair tread material which was zip-tied to the SS rack. So no wear on the sack or rack, and the ribbing kept it from sliding beautifully. The same material makes great mudflaps, too. For $10 you can get a life-time supply.
That's very good to know - thanks for the tip!