This invention relates to a yarn having high moisture regain for use in arc and flame protection and fabrics and garments containing the yarn. The yarn has a blend of fibers which includes 10 to 40 weight percent meta-aramid fiber having a degree of crystallinity of at least 20%, 20 to 60 weight percent modacrylic fiber, 15 to 45 weight percent FR rayon fiber, and (d) 5 to 20 weight percent para-aramid fiber; based on the total weight of these components. If desired, 1 to 3 weight percent of the para-aramid fiber in the yarn can be replaced with an antistatic fiber as long as at least 5 weight percent para-aramid fiber is present.