MWG TRANSMISSION™ flame-resistant (FR) base layer is ideal for cooler days. It fits comfortably beneath a sweater and jacket for another layer of warmth and protection. You can also wear it on it’s own, as it provides 9 cal / CAT 2 protection from potential worksite hazards. It’s crafted from inherent MWG TRANSMISSION™ flame-resistant fabric that is thermal regulating and has flat lock seams for maximum comfort. It’s extremely important to wear a quality FR base layer – as it can prevent serious injury in the case of a workplace incident.