The Flamestretch® Pullover is the warmest flame-resistant base layer option to fully insulate the end user while being moisture-wicking to keep the user warm during operation. Wear it standalone or combined with Cool Knit® or HotJohns® to create a mission-dependent ensemble. Each garment is constructed with our proprietary Flamestretch brushed-back knit fleece fabric that features DuPont™ Kevlar® and Nomex® brand fiber - the first flame-resistant fiber selected for use in military uniforms. Safe-to-Fly (StF) Approved by U.S. Air Force - Air National Guard.