Servus SFTM Overboot Slip-On 4 in - Mens Black/Yellow 10. 136 states; The employer shall ensure that each affected employee uses protective footwear when working in areas where there is a danger of foot injuries due to falling or rolling objects or objects piercing the sole and where such employee's feet are exposed to electrical hazards. For more information go to www.osha.gov. Canadian Standards Association - CAN/CSA Z195-09 Package Contents: Servus SFTM Overboot Slip-On 4 in - Mens Servus 75109-BLM-100: SFTM Overboot Slip-On 4 in - Mens Black/Yellow 10