Original Design,Elegant Appearance,Soft & Comfortable Fabric: The heated shoes is made of soft woolen cloth and heat insulating cotton,the house slippers hold your feet tightly with elastic materials and care for your feet like babies.The soft upper and thick warm padding cotton make the shoes very elastic.Suitable for Size EU 36-40 ;US 5.5-9 ;UK 3-6.5( 31cm length). Safe and Reliable Advanced Heating Materials: The USB usb electrical heated shoes can be heated quickly to a high temperature,with a maximum temperature of 150 F.The heating material is washable and bending-resistance. The heat generated by advanced heating materials wont decline with the increase of service time. The shoes work under 5V voltage,very safe and reliable. The Water proof and N-on-Slip Sole Design Makes the Winter Shoes Suitable for Indoor and Outdoor Leisure: In winter,you can enter the bathroom wearing the heating shoes warmer,without changing your shoes. In an outdoor dry environment,a portable power bank can be used as a power adapter.You can also use a car charger to power the heated slippers shoes while you are relaxing in the car. Easy to Use: USB power or electric adaptor,output 5v=1A,2A.When first using it,it may takes 1-3 minutes to heated and warm your shoes. Use adaptor will heating more faster and warm. When you pull out the USB cable from USB device,slippers will stop heating. Easy to Clean: One pair slippers comes with 2 heating carbon fiber heating pads.You can take out the heating element when want to wash your slippers. Weight: 275g Size: 31*12cm Color includes: black, coffee, gray Package includes: 1 pair * heating warm shoes Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 1-2 cm differences due to manual measurement.