Material: Ultra-soft acrylic blend with excellent insulation. One size, for men, women, children. Features: Unisex knitted LED Bluetooth LED bezel with 4 built-in and removable rechargeable LED lights.10 hours of battery life, offers a standard USB port to charge the battery, you can charge it in a car charger, computer or power bank portable power supply, never buy again and charge the batteries. The longest working time in the market: Bluetooth hood with built-in 300mAh rechargeable lithium-ion battery can work for about 8 hours of working time. talk time and 6 hours of playtime, while other brands only have 120 mAh and 1-2 hours of play time. Unisex, washable, thick knit: lightweight, removable, cool to the touch , fully washable, stretchable, suitable for all sizes and shapes, has 3 light intensity settings. USB rechargeable batteries included. Unique gifts for men and women: upgrade Bluetooth mobile phone function to the latest Bluetooth V4.2 technology and synchronize them with any Bluetooth device in just a few seconds, hands-free connection, including reject/receive calls, listen to music wirelessly, up to 33 feet (10 meters) keep warm in winter. Best Christmas present