Grog (clay) Grog, also known as firesand and chamotte, is a ceramic raw material. It has high percentage of silica and alumina. It can be produced by firing selected fire clays to high temperature before grinding and screening to specific particle sizes. It can also be produced from pitchers.
1 Excellent Support- Every single KURU athletic shoe offers the most supportive design available. Our HEELKRADLâ¢ feature centers the foot to cushion each strike of the heel and absorbs shock with each step.  Durable Construction- Long lasting, dependable shoes will improve your training on any surface.
EVA sole is very commonly used for middle sole of shoes part, Insole or outsole of sport shoes, soles of slipper or flip flop. Rubber Sole. The advantages of natural rubber is that it is very soft, very good flexibility, suitable for all kinds of sports, but the drawback is also very obvious that is very wearable.