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.
Converse has been at the forefront of athletic footwear since it introduced the first performance basketball shoe, the All Star, in 1917. Other milestones in the development of the brand include the introduction of the Jack Purcell tennis shoe in 1937, the Pro Leather in 1970 and the One Star in 1974.