Ergodyne 41222 N-Ferno 6472 Insulated Bib Overalls - 300D Oxford Shell S (Black)Ergodyne Ei 41222 The N Ferno 6472 Insulated Bib Overalls are designed to be worn over work pants for warmth and durability in cold environments. The 300D polyester oxford with breathable water repellent coating protects from the elements, while the thermal insulation and quilted lining keeps workers comfortably warm. These black winter work bibs hide dirt and feature reinforced knee patches for long lasting wear. A heavy duty front zipper closure,