Exceptional anti-fatigue performance with striped border safety feature. Happy Feet mats feature a dense cushion encapsulated within solid, 100 percent nitrile rubber to protect against deterioration. This construction makes Happy Feet mats highly resistant to chemicals, animal fats and petroleum products. Happy Feet is welding safe and static dissipative. Dense rubber cushion construction encapsulated with solid nitrile rubber resists damage from heels and chair legs and protects cushion from exposure to oil, grease, chemicals, etc. Grip Surface: For wet areas where maximum traction and/or scraping is needed. Grippers on the back minimize movement. Low profile borders will not crack or curl. Closed-cell cushion backing is permanently molded to the Nitrile Rubber surface. Can be sterilized in autoclave. 1/2″ overall mat thickness. Surface and Back: 100 percent Nitrile Rubber (15 percent Recycled Content), 1/16″ thickness. Foam core: natural type, 3/8″ thickness. Testing: Passes Flammability Standard DOC-FF-1-70. Green border color. Measures 3′ length by 2′ width.