The Innershield Layer ZLF is great for defensive play. Its strength comes from its layers. The whole paddle has been made using inner fiber technology and uses 2 ZL fiber layers. ZL Fiber is a special blend of fiber made by Butterfly. The Innershield Layer ZLF has a soft touch which provides more sharpness and stability to your shots.
JTTAA stands for "Japanese Table Tennis Association Approved". Blades that are used in local and national tournaments in Japan must all be registered in the Japan Table Tennis Association. In the association they actually have crew to select blades in order to ensure the quality of the baldes, both imported or locally-made, are premium. Unqualified blades are not allowed to registered. So JTTAA is indeed a sign of quality, Japanese are so conscious in their effort of quality control.