ANSAI Women's Mobile Warming Softshell Vest Carboflex Made with Carboflex stretchable material the vest provides additional flexibility with two heating panels on the chest and one on the back to provide quick warm-up and even distribution of heat where needed most Includes one 7.42V 2.2ah rechargeable lithium-ion and charger; battery that features built-in 4 level thermo-regulating controls and provides up to 10 hours of comfortable warmth Hand wash or machine-wash on the gentle/delicate cycle using the warm-water setting (water temperature below 50F) and a mild detergent. Do not use bleach. Remove from washer and hang/air dry. China. Do not wring out or twist the garments, this will damage the heating elements. Do not tumble dry, iron or dry clean.