Tru-Spec undergarments manufactured from Cordura brand Baselayer fabric provide an extra layer of comfort and protection. The 60/40 cotton/nylon jersey knit fabric provides advantages beyond those of either cotton or polyester, including extreme breathability and moisture wicking. It also won't melt or drip like polyester, helps protect against flash fires and reduce the severity of burn injury by charring, and is strong, abrasion resistant, and less susceptible to holes, tears, and snags.