Yes, you can still utilize additional bumpers on the Double Depth Mat. Please note that the bumpers will only cover the top ½” of the putting surface, and will not cover the sub-base. To install bumpers on your Double Depth Green, you will want to leave about 1” of space from the edge around the perimeter with no tape so that the bumpers can be easily snapped between the two layers (the bumpers can be put on prior to adhering the sub-base, or after adhering the sub-base as long as you leave that slight gap.