battery heated vest,heated vest,battery heated waistcoat,heated jacket,heating vest,heating waistcoat,fir heating vest battery heated vest1) Built-in far infrared heated fiber2) It can keep body warm and increase the blood circulation3) Power: DC 7.4V 4400mA rechargeable battery4) Size: S to XXXL 5) Materials: 65% poly and 35% cotton, 21 x 21, 108 x 56 6) Accessory: rechargeable battery