... Features : International leading technology: Negative Ion & Far-ir double-chip,double health. High performance :Green core to ... improve immune function,stop pains and inflammation. Far-ir sanitary napkin, with 8 layers,take care ... up three times to prevent wetness. 2) Far-ir & Anion Chip:Made by non-woven fabric , ... Envelope Wrapped:Make good wrapped , sealed film bag keep the germ out ,depollution.