1 thick diamond plate recycled anti-fatigue drainage mats 4-sided mat yellow borders these safety mats combine ergonomic comfort and support with a clean and safe drainage system. Anti fatigue safety mats are made with 100% recycled pvc that is chemical, oil and grease resistant; yellow borders are not made from recycled material. Multi-tiered footing design elevates mat off the floor to create air pockets that allow ergonomic support. Safety mats feature 7/8 diameter drainage holes that facilitates the removal of liquids and debris without clogging. Mat surface has a raised diamond tread pattern for slip resistance. Beveled edge borders help eliminate trip hazards for safety and feature a raised, inverted v-pattern for traction. Iso 14001 registered.