Seattle Sports Standard Canoe Foam Block - Pair
I used these blocks to haul a canoe on top of a Chevy Impala along with 2 spare blocks my dad had lying around. The blocks my dad had were similar but had some non-slip grip material on the bottom which is nice. But these definately did the trick and the canoe didn't move an inch during the 3 hour drive. They are made of sturdy foam and slip easily onto the gunnels of the boat, could use on any car as cushion for the boat or even a truck if you needed it to rest on a "sensitive" area like paint.