Ronning Electric Shoe Boot Footwear Dryer in the Box-made in Norway Ronning Electric Shoe Boot Footwear Dryer in the Box-made in Norway In original box. Inserts measure 8 1/2" in length. Color Blue. Unisex Adult. 110 Volt. Aluminum Construction. These will not overheat your boots. Useful for hunting, fishing, hiking, camping, etc.