Fabric/Material:
Soft, durable high grade 100% cotton
Washing instructions: remove battery pack, heated elements and machine wash
HeatSupport Advantages:
1. 7.4V 4000mAh re geable Li-Polymer battery, red far-infrared heated pad, durable 6 hours when the battery leading on high output level
2. HeatSupport features 4 adjustable heat settings
3. Battery working time: 7-12 hours