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.
Altra Olympus: The best running and exercise walking shoes with a rocker sole for people with wide feet. Excellent for runners who need more cushion or have ball of foot pain. Altra shoes have a zero drop, which means heel and forefoot at the same level, no heel lift.