String technology can allow you to further customize your tennis racquet to improve your tennis game. For instance, you can buy according to string technology that has been developed to make tennis strings longer lasting, technology that gives more spin and even more power. Kevlar, for instance, is considered the strongest tennis string material, and if you get a thicker guage, they will last you even longer. Polyester, a fairly new technology that has become popular with professional players, also provides exceptional durability for frequent string breakers. For those of you who want more power, you should be looking at the resiliency of the strings.