This beanie cap is made from ultra-soft and excellent insulation acrylic stretchable material, which has great elasticity, provides the maximum comfort,delicacy, and mobility for most versatile lifestyle indoor, sports-active outdoor, or everyday usage without compromising the convenience. It is hand washable, please remove the LED and the headset before washing. Built with easy-access USB charging port, simply charge it via the included USD cable. It takes 1-2 hours to get full charged.