Polyester, Imported. Machine washable.

7.4V 16000mAh battery pack included can fast heat in 3 seconds, warms up faster and warmer than 5v heating vests on the market. Up to 20 working hours on a single charge.The battery pack has a built-in safeguard system can keep your electric vest safe from over-current, overheating.

The warming heated vest covers 8 heating areas, abdomen, neck, waist and back. Built in with quality carbon nanofibers heat elements. This men's heated vest can promote blood circulation, relax muscles, bring enough warmth to the body. 3 heating level from 45℃/ 113℉ to 65℃/ 149℉, dual switches individual control the Front and Back,you can heat on demand.

Featuring quilted, lightweight design and fine interior lining, bring a fitted shape. The smart heated vest has excellent water proof, windproof and warm-keeping quality, ensure you be able to enjoy exceptional warmth, no restriction on wearing during sports.