One of the top features found in the TronX Adjustable is the injected comp weave quarter package. This technology offers moderate stiffness with enough flexibility for the recreational to intermediate player. With this flexibility, you can work on your stride while also being comfortable in your skate. Digitized sizing on the side of the boot with a twist lever to change the size. This is the most technical and easiest to use adjustable skate to date. The unique boot one-piece construction provides some of the best ankle support at this price, while the thick internal foams make for a comfy feel right out of the box. On the bottom of the skate, TronX used a Hi-Lo aluminum 6000 CNC frame chassis with copper rivets for a higher level of performance. This provides a unique skating angle, with bigger wheels in the back and smaller wheels in the front. With this popular frame design, you get the best performance benefits of both sized wheels.