Heavy Duty, Dual Layer Flooring Kneepads, Ballistic Poly Fabric & Tough, Textured PVC Outer Shell Provides Extra Durability & Protects Finished Surfaces From Scuff Marks, High Density, Closed Cell Foam Padding With Core Technology Helps Reduce Pressure On Kneecap For Extra Comfort, Slip-Buckle Fastener System With Adjustable Straps, Neoprene Fabric Liner Helps Keep Knees Comfortable Throughout The Day.