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Keep your feet toasty warm all day long with Heat Factory's Women's Universal Flat Insole! Featuring a unique heating system that provides consistent heat, these insoles are perfect for people with cold feet, poor circulation, or anyone who wants to add some warmth to their day. With an easy-to-use replaceable warming insert, these insoles are ideal for walking, hiking, snowboarding, skiing, and other outdoor activities. The Universal size makes them a versatile option that can be used in any shoe, while the flat arch height ensures a comfortable fit for all foot types. Try Heat Factory's Women's Universal Flat Insole and experience the warmth and comfort you deserve!