Perfect Burpee Exercise Mat (6.5ft Long X 3.3ft Wide X 5mm Thick) HIGH QUALITY - Triple layer design with 4mm of high-performance natural rubber. HIGH QUALITY - Triple layer design with 4mm of high-performance natural rubber. SHOCK ABSORPTION - Tough enough for shoes and provides a healthy cushion for your joints. EXTRA GRIP - Our Smart Grip surface coating provides unparalleled grip. ECO FRIENDLY - Made from earth friendly biodegradable materials.