PERFORMANCE FILL: The Facility Series 6ft Heavy bag is filled at the core with 100% textile fill. There is no added sand weight that can shift and create dangerous hard spots in the bag. To further improve the consistent feel and appearance we add a layer just under the padding. DURABLE CONSTRUCTION: Constructed with our durable and cleanable T-Flex Poly Shell creates the gold standard in punching bags for facilities and home gyms. Punches… Kicks… This heavy bag can take anything you throw at it.