Olefin Made in USA Attach to your steps using a hook-and-loop fastening system, providing a safe, slip-resistant surface for you and your family including your dog or other pets Each stair tread comes with four adhesive-backed hooked-fiber strips that adhere to your step and four looped-fiber strips sewn into the back of each tread that attach to the hooked-fiber strips Intentionally low profile design of the hook-and-loop system creates a firm grip with no added bulkiness Made of high-quality olefin carpet to resist stains and bound on all edges to prevent fraying These carpet stair treads can be removed and reattached as needed for cleaning