Anonymous shipping, brand new, unused. "Kiribai Netoki Ashi Hotton 4 Pairs" x 4 bags Expiration date: 2026.4 ● This is a warming sheet to be applied to the feet when sleeping. ● For those who suffer from cold feet to the point they can't sleep. It gently promotes blood circulation in the feet with a warmth of approximately 45°C*. ● The warming effect lasts for 6 hours. *Surface temperature of the warming sheet