Kiribai Ashi Hotton for Sleeping, Pack of 8, Set of 10 Brand new, unused. For those suffering from cold feet that prevent sleep. Gently warms and promotes blood circulation. Warms the toes. Expiration date: April 2026 ● These are warming sheets to be applied to the toes while sleeping. ● For those suffering from cold feet that prevent sleep. The warmth of approximately 45°C gently promotes blood circulation in the toes. ● The warming effect lasts for 6 hours.