IT is also an important safety feature. For torklift tie down on the instructions you can reed ``Minor movement (or settling) can occur in some incidental harsh driving conditions (on or of road). A rubber bed mat is not a requirement to maintain the lifetime warranty on torklift tie down systeme, but a STRONG RECOMMENDATION, simply as a safety precaution to protect the truck bed, the bottom of the camper and to give the camper additional support``.