Undergarments: For maximum protection, layer up by combining extraordinary PBI outer shell fabrics with lightweight PBI knit fabrics for an advanced multilayer system that provides the ultimate in personal protection. PBI Gold® - Knit fabrics are ideal for wearing next to the skin, and are lightweight, soft, cool and thermally stable under high-heat conditions – thus engineered for comfort and protection. PBI Gold keeps you cool, dry and absorbs perspiration better than other knit fabric on the market. The high moisture regain of PBI wicks sweat from the body, while offering a soft feel against the skin. And, since PBI Gold provides the ultimate in thermal protection, more Thermal Protective Performance (TPP) per ounce than Carbon® or Nomex®, lightweight versions of PBI Gold can be used in virtually any application offering less bulk and more freedom of movement. So whether you're a first responder, industrial worker or motor sports professional, PBI fabrics provide a winning combination when it comes to comfort, protection and safety.