Item Type: Insole foot warmersMaterial: WormwoodSize: 36-39 size1¡¢Rapid Heating: Insole foot warmers can keep warm for 10 hours, with a rapid heating of 5 seconds and a constant temperature of 48 degrees Celsius. 2¡¢Thin And Soft: Heating foot insole is 3mm thick, thin and soft, which has integrated and ultra thin design, which is comfortable for you when you wear it. 3¡¢Large Area Heat Dissipation: Warm heated foot insole can heat around, the heating area is increased by 90%, and the insole surface is evenly heated to all feet. 4¡¢Applicable Shoes: Wormwood heating foot insole are very suitable for single shoes, high heels, slippers, cotton slippers and casual shoes to feel comfortable. 5¡¢Material Of Wormwood: 10 pairs disposable heated foot insoles are made of wormwood, which is very safe and healthy to the body, which are durable.10 x Pairs of Insole Foot Warmers