Use the NRS Universal Foam Canoe Blocks (set of 4) to protect your canoe and the top of your vehicle during transport.
Durable minicell foam cushions your boat and protects your vehicle.
The slot in the foam blocks can pop onto the canoe gunwales (two per side). Then the flat non-skid surface is placed directly on the vehicle roof.
Please note: Tie-down straps are necessary to safely carry a boat on your car.