Our lightweight FLEXSAFE™ fabric is inherently flame-resistant (FR), and inherently comfortable. It is a 4-way stretch fabric and constructed with flat lock seams for maximum comfort, whether you wear it as a base layer or an everyday t-shirt. It wicks moisture away from the skin, keeping you cool, dry, and fresh all day long. It is the softest and most comfortable FR base layer shirt we’ve ever made. Guaranteed comfort and quality – or your money back!