Neoprene,Eva COMFORTABLE LIGHTWEIGHT FOAM PADDING - Expanded foam and EVA gives the softest, thickest support for your knees while still being contoured to your knees REINFORCED DOUBLE-STITCHING-Super-strong quality stitching protects against tearing and detachment; The material is sturdy, stretchy and will last you for years! SUPER FLEXIBLE QUALITY NEOPRENE-Premium Neoprene material means no uncomfortable material biting into your legs as you kneel down while provides the flexibility when kneeling, standing or walking. NO-SLIP STRAPS-Straps are located both above and below the knee so your pads will stay place; Extra-long widths and velcro strips fit most knee sizes WIDELY USE-Ideal for cleaning, scrubbing the floor, gardening, car repairing, house chores, exercise, cargo sorting