Product Comfortable Materials & Washable: Heating Scarf Uses Breathable And Ultra-light Material. Comfortable Cotton With Decent Elasticity. The Whole Scarf Is Can Be Washed Repeatedly, Easy To Clean, Not Afraid Of Sweating When Using. The Perfect Gift: A Great Christmas Present To Keep Your Loved Ones Warm During Winter. Also Great For Birthdays And Other Occasions. Suitable For Cycling, Hiking, Camping, Fishing And Other Outdoor Activities In Autumn And Winter. Fast Heating: After Pressing The For 3 Seconds, You Can Feel The Warmth Of The Temperature Spread In The Neck For Blood Circulation And Comfortable Relaxation. 3 Heating Levels: Three Heating Control, Respectively 55C , 48C, 42C One-button Can Easily Adjust, The Elderly And Children Can Easily Use. How To Use: USB Use 5V Power Bank To Use.When The USB Cable Is In, It Can Be Used By Connecting USB Port Devices, Such As Mobile Power Supply, Personal Computer And Other 5V Low-voltage Power Supply Devices, Which Is Safer To Use. Packageinclude:1x Heated Scarf Note: 1. Due to the different monitor and lighting effect, the actual color of the item may be slightly different from the color shown on the pictures. 2. Please allow 1-3cm error due to manual measurement. (1 inch = 2.54 cm) Thanks for your support :)