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.
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The best athletic shoes and gest gym shoes for walking for fit, stability, and style. Bulky, stiff sneakers are outâcomfort is in! The latest research shows that athletic shoes that overrestrict foot motion may contribute to injuries, and so can flimsy flats.