Their double-layer design has an inner layer of Arimand/KEVLAR® blend and an outer layer of Nomex 3 flame-retardant fabric. The layers are channel-quilted together, and the jackets are sewn with Nomex thread and feature Nomex cuffs and zippers for great protection. These lightweight jackets meet SFI-3-2A/5 standards and are available in a variety of colors.