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.
Nike is the worlds No. 1 Footwear and Sportswear brand. Adidas is the worlds No. 2. Footwear and Sportswear brand though they lost that position briefly to Under Armour in late 2014/2015 but has reclaimed it in 2o16. Adidas is perceived as making more comfortable shoes. Adidas is more popular in 2o16 than Nike.