This neck warmer maintains warmth at 48℃. - Product Name: Warm Ring PCM Neck Warmer - Size: M (Fits neck circumference 32-36cm) - Color: Ivory - Temperature Retention: Maintains below 48℃ - Feature 1: With fur cover - Feature 2: No power or batteries required - Feature 3: Reusable - Feature 4: Uses state-of-the-art "PCM material" Although new and unused, it has been stored at home, so please refrain from purchasing if you are sensitive to this. Thank you for viewing.