Moisture wicking and skin temperature regulating technology makes the DRIFIRE FR Control Long Sleeve T Shirt provide a comfortable FR work shirt or base layer option. The inherently FR long sleeve t shirt won't wash out, provides odor control, reduces heat stress and has an arc rating of 4.0 cal/cm2. The DRIFIRE FR Control Long Sleeve T Shirt is a superior choice in men's FR workwear and base layer options. Click How to Buy' to find a distributor of your choice for comfortable FR clothing.