Use strong rope or straps and make sure the mattress is tied down lengthwise and widthwise keeping the fastenings well centered.
How to tie a mattress to a roof.
Do the same side to side near the rear of the mattress.
Secure the front end of the mattress and then the other end of the mattress.
Run one ratchet strap side to side near the front of the mattress attatching each end to the luggage rack.
While you want your rope to be strong you also want to be able to tie it.
After the mattress is secure in the plastic place the mattress on the roof.
First wrap the mattress in a bag new mattresses generally come in one or you can buy one at a hardware store and use packing tape to close the bag and secure any loose plastic.
Place the mattress quilted side down first the the box spring on top of the mattress non skid side down.
Still there is a basic method to follow when tying a mattress to the roof of a car.
Buy sturdy rope nylon or polyester based put a piece of rope on the roof of the car that goes from back bumper to front bumper.
Place the mattress on the roof making sure it s in the middle.
Choose a rope that s strong but not too thick or hard to manage.
Put the mattress on top of the car and rope so that it goes length wise with the.
Center the mattress in the middle and put the rope over the length of the mattress.
If you do secure your mattress to a roof rack or safely in the bed of a truck strap it down with ratcheting straps.
If the cherokee has a luggage rack it would be ideal.
Pull the rope tight so there is no extra slack.
Secure your mattress to the top of the car.
This will stress any knot no matter how securely tied.