OUR GLUTE GUARDS ARE MADE WITH OUR SOFT, YET VERY DURABLE MESH.  UNLIKE OTHER DESIGNS, WE HAVE PLACED 4 1/2 OUNCE WEIGHTS THROUGHOUT THE GUARD.  THE WEIGHTS KEEP THE GUARD IN PLACE WHILE YOU ARE RIDING, THEY ALSO KEEP IT MOVING EVER SO SLIGHTLY TO KEEP THE B-52 BOMBERS FROM BEING ABLE TO BITE YOUR EQUINE!