An additional layer, which is made of same or different material and configured with same or different surface pattern variations, may be added to the pad at {HEAD ~ its lower and upper surfaces} for extra comfort and {TAIL ~ friction} 
An additional layer , which is made of same or different material and configured with same or different surface pattern variations , may be added to the pad at { HEAD ~ its lower and upper surfaces } for extra comfort and { TAIL ~ friction }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL