100% Acrylic Ultra-soft and excellent insulation acrylic blend material.One Size fits all,men,women,child. Unisex knitted hat with 4 built in and removable rechargeable LED light.10 hours runtime, offer a standard USB port for charging battery, you can charge it in car charger, computer or portable power bank,no longer re-purchase and charge batteries. Provides enough light for finding your way in the dark or completing tasks in poorly lit environments,meanwhile the knitted cap can keep you warm in the cold winter when you go outside. Light is removable, cool to the touch and has 3 light intensity settings. USB rechargeable batteries included. Washable, just pick off the light and wash it by hand/machine. Beanie cap hat with LED light is ideal for Dog Walking, Jogging, Biking, Camping, Hunting, Fishing,Hiking, Handyman Working,Grilling, Auto Repair and Home Improvement or any other activity needing hands-free lighting.It\'s also a great Halloweens/Christmas/New Year\'s gift for your family members, friends and anyone you love.