Timberland PRO Men's Split System Insulated Jacket Main Fabric: 100% Nylon; Thermolite Insulation, Lining: 100% Nylon Imported Machine Wash Rugged two layer nylon ripstop with durable water repellent finish that will stand up to the most demanding jobsite encounters Bi swing back for added mobility Elastic waistband and cuffs fully encased in nylon rip stop Nylon quilted lining for warmth and comfort you can see and feel Zoned insulation, 100 gram thermolite insulation in the body plus 80 gram thermolite insulation in the arms