Use these thick pads to cushion knees or brace elbows during long welding runs. They’re covered in a fiberglass fabric that holds up to sparks and spatter. For added protection, the top of the pad has a second layer of silicone-coated fiberglass that resists abrasion and tears. The foam filling is soft enough to kneel on but rigid enough to prop your arms when you’re welding in an awkward position. To carry these pads between jobs, fold them in half and secure with the hook and loop tabs at each end. You can also join pads end-to-end and create a larger work surface.