The FR429GRR4XL Insulated Bib Pants by Portwest LLC are designed for extreme cold weather conditions. These 4XL bib pants feature a flame-resistant outer layer that meets ASTM and NFPA standards, ensuring safety in hazardous environments. The insulated lining provides excellent warmth, making them perfect for outdoor work in winter. With adjustable straps and multiple pockets, these bib pants offer both comfort and functionality. Ideal for professionals in industries such as construction and oil and gas, the FR429GRR4XL is a reliable choice for those needing protection against cold and flames.