Discover... Not only does this base layer vest help to regulate body temperature, but it also provides an extra layer of resistance when worn underneath other flame-retardant clothing. If worn under a fleece, polo shirt or overalls, it can reduce the risk of burn injury by giving the wearer longer to react before sustaining a burn to the skin. This flame-retardant underwear is manufactured from an inherently flame-retardant fabric which means the FR protection can’t be washed out. Learn more... • Antistatic T-shirt made with PROTAL modacrylic fibre, which is inherently flame-retardant so it won’t wash out • Seamless knitted technology reduces the number of seams offering excellent comfort • Lightweight stretchable fabric helps to provide a great fit and maintain body temperature Get technical... EN 1149-5:2008 EN ISO 11612:2008 A1 B1 C1 ArcoPro Charcoal Long-Sleeve Flame-Retardant Vest 3XL