National Safety Apparel U52FKSR or U52JKSR   $88.97  No Sales or Local Tax!  Drifire FR Control Long Underwear  DRIFIRE FR Control long underwear keeps the wearer cooler on hot days and warmer on cool days with lightweight breathable fabric, heat stress reduction and unsurpassed moisture-wicking and drying rate. Inherently FR, this stretch fabric proactively regulates skin temperature ( /- 3 degrees) and reduces perspiration by as much as 34%. 

U52FKSR_ _ (Navy)

U52JKSR_ _ (Desert Sand)

• Arc Rating: 4 cal/cm²
• CAT 1
• Fabric/Material: 5.5 oz. FR CONTROL 2.0™
• Proactively regulates skin temperature ( /- 3 degrees)
• Reduces perspiration by as much as 34%
• Keeps the wearer cooler on hot days, warmer on cool days
• Heat stress reduction
• Odor control technology
• Lightweight, breathable fabric
• Unsurpassed moisture wicking and drying rate
• Inherently flame resistant, FR protection will not wash/wear out
• More stretch for a better fit
• Made in the USA
• Arc Rating: 4 cal/cm²
• CAT 1
• NFPA 70E
• CSA Z462
• ASTM F1506
• OSHA 1910.269