Click on ``Style options `` at the top of this page, scroll down, to see the various materials available for bases. There are brief listings of the pros and cons, shown. It`s a matter of your own choice. You can also order a system using a combination of materials such as all -lace with part of the perimeter made of poly, and for coverage of temple area down onto sideburns french lace is recommended for durability at the sides. The advantage of lace is the detectability issue as it is the easiest on the eye and to the touch -it also allows for much better breathing of the skin beneath it, thus [ in my view ] healthier, for prolonged bonds. Paul.