Kiribai Kairo For Socks - To be applied on the instep - 15 pairs 8-hour duration Disposable hand warmer - Quantity: 15 pairs - Color: Black - Heating time: 8 hours - Application: For socks - Made in: Japan - Thickness: Approximately 3mm - Expiration date: April 2029 The product will be shipped after being taken out of the box. (The box will also be sent.) Thank you.