Bought these mostly for the Therm-ic option (you have to buy the Therm-ic battery packs separate from the boots, and some rechargeable AAA batteries). Very nice thing to have the cold days! Only issue was the heater section on the top of the foot is kinda stiff and uncomfortable, so we put some tennis balls in the boots when not wearing to help alleviate the pressure. That works well. Anyway, overall very good boots and definitely worth the sale price here.