Sevyn by Estetica is part of their Heat Defiant collection. What makes this basic cap wig unique is its synthetic hair. The fibers are made to withstand heat from styling tools.Our recommendation for styling Heat Friendly fiber is to stay between 275 F-300 F for best results. The long hair wig has lush curls for an elegant style. The lace part and lace front help give the wig its natural look.