Ergo Tred Mat is a medium duty, 100% natural rubber anti-fatigue Mat. The unique domed patterned surface has been ergonomically designed to give maximum comfort and keeps the feet moving to improve circulation in the legs and feet. Non trip safety edges come standard on all four sides and are available in a yellow option to increase visibility of mat warning of potential hazards. This mat is suitable for use in dry, medium use environments where comfort and relief is needed from standing on a hard surface