A hybrid outsole construction comprises high-density carbon rubber molded to low-density blown rubber, providing increased flexibility, cushion, and comfort while maintaining durability, traction, and shock absorbency of the footwear. The multi-layer cap structure includes a layer with a low etch rate to protect metal from damage during anisotropic etching. Exemplary embodiments may further include a magnetic field sensor disposed to measure the imparted magnetic field along the length of the tubular as it is removed from the track after magnetization. Thus without using headset and microphone, the user can control the wireless controller and also communicate with the other online player within an effective transmission range.