Flame-resistant work shirt is made from seven ounce 100 percent durable cotton twill fabric. NFPA 2112 certified to help protect you against hazardous conditions that can occur on the some of the toughest jobs. Solid khaki combined with oilfield camo accents. About oilfield camo: rugged. Hard-working. Effective. These adjectives not only describe the oilfield camo, they describe the people who wear it. The pattern is made up of iconic oil and gas industry imagery and iconic tools of the trade. It's not just a pattern, it's a way of life. Each Walls FR garment is engineered for comfort and durability to act as a seamless extension of the working body in motion. Your safety is our primary goal.