When it comes to flame-resistant protection, every layer matters. Your outermost layer must always be flame-resistant, and a strong layering system helps keep you safer and more comfortable on the job. That is why Big Bill unlined jackets, liners and vests are designed to work together, giving you flexible options for different temperatures and different levels of protection. A properly layered flame-resistant system does more than keep you warm. The air between garments can increase overall arc protection, which makes flame-resistant liners and vests an important part of your safety program. Big Bill offers a wide range of unlined jackets built for mobility, rugged flame-resistant liners that add warmth without bulk and durable vests that deliver core protection in changing weather. Whether you need a lightweight outer layer for milder days or a liner that can be worn under a jacket in colder conditions, these pieces give you the versatility to adjust your system as the weather shifts. Many styles also offer storage in all the right places, so your tools and essentials stay close at hand. Every Big Bill flame-resistant jacket, liner and vest is arc-rated and fully compliant with ASTM 1506, CSA Z462 and NFPA 70E, providing reliable protection for workers across high-risk environments. Tested to high standards and built to last, these garments help you stay covered, stay comfortable and stay compliant in any season.