1USB HEATING: You can choose between a USB port, a power adapter or a mobile power source to heat the insoles. And it also has 3 gears temperature adjustment. 2SOFT MATERIAL: Electric heating insoles are made of premium fabric, delicate to touch, warm and breathable, skin friendly, soft and comfortable to use and stable. 3EASY TO USE: Heated insoles are easy to use, you just need to put them in your shoes and connect them to the power supply to enjoy the warmth. The heated insoles can be cleaned, but you should make sure they are dry before use. 4WARM GIFT: Electric heated insoles are excellent gifts for men, women, your loved ones, parents, friends, the elderly, etc. It is a pleasure and happiness to enjoy the warmth with others. 5WIDELY USED: Heated boot insoles are indispensable items in daily life during cold weather, also suitable for winter outdoor sports, such as winter skiing, hunting, camping and horseback riding.