Steam heat sheets that promote blood circulation with a warmth of 40℃, lasting 5-8 hours. - Product Name: Megurhythm Steam Heat Sheet - Quantity: 16 sheets - Operating Temperature: 40℃ - Duration of Use: 5-8 hours - Purpose: Promotes blood circulation Set of 2 boxes (both new) Since I plan to ship via Yu-Packet Post, I will remove the sheets from their boxes for shipping. The boxes described in the product description will be folded and included. Thank you for your understanding. Thank you for viewing.