Gray fleece slippers with a 5000mAh battery, offering three-level temperature adjustment up to 55°C, and usable for up to 17 hours. - Model Name: SRPP25SGY - Color: Gray - Material: Fleece - Battery Capacity: 5000mAh - Usage Time: Up to 17 hours - Temperature Adjustment: 3-level adjustment (up to 55°C) Purchased from Japanet, but it's a new, unused item. The package has been opened. The slippers have been tried on. I bought them for about 10,000 yen including shipping. Thank you for looking.