Far Infrared Thermal Side Pockets Tight Compression Leggings -black

Eco Light:HEATRANS technique converts the light absorbed by the fabric itself to the heat to keep your body warm, without any other energy needed. 
Keep in warm:Keep in warm by absorbing and retaining the heat generated from our own body.
Tested:Cooperating with ITRT, the fabric processed with HEATRANS technique is proven to rise temperature for 2-3 degrees and can last for 30 minutes after lighting on it.