Static Dissipative. SD shoes reduce the risk of static shock to people and to the manufactured product in the workplace. Meets the ASTM F2892-18 SD35 standards. Cement constructed with Carhartt rubber FORCE outsole. Black and amethyst lightweight knit upper with abrasion resistant heel and toe. Carhartt footbed made with Insite technology is engineered to create maximum arch support to reduce foot fatigue during long days on the job.