Normally if without it you wear out the desktop top surface. that is NO GOOD! But the mouse pad must be securely fastened to the desktop as so it dies not slide around with the mouse. Hence there are two ways to fasten it it is up to the user as to HOW? 1. 3-inch box tape; 2. A pair of small 'C' clamps. The latter does not mar the vineer desktop!
Inexpensive and does the job. Mine has never moved around on my desk. The backing has a gripper that keeps it in its place. It is thin but I don't understand why anyone would want a bulky thicker mouse pad. Works just as it should. Now I can feel free to replace when dirty or worn as needed too because of the price.