The Klimatex JIRA THERMACOOL SOFT women's long-sleeved functional T-shirt is crafted from high-quality Thermo Cool Soft fabric, combining hollow and profiled fibers for maximum comfort. The hollow fibers offer superior temperature regulation, keeping you warm in cold conditions and cool in warmer temperatures. Meanwhile, the profiled fibers efficiently wick away moisture and dry quickly, ensuring you stay dry even during intense activities. Contrasting flatlock seams prevent skin irritation, providing a comfortable fit whether worn alone or as a base layer. Reflective elements enhance visibility and safety in low-light conditions, making it perfect for outdoor activities in colder weather or at night.