1. The heated scarf is made of fleece fabric, with a heating element embedded in the center. It connects via USB to an external power bank (not included) for operation. 2. An internal zipper pocket provides secure storage for a power bank, enhancing convenience and allowing the scarf to be folded for compact storage. 3. Features a concealed switch button with intuitive key-based control: press and hold for three seconds to power on; the default setting is low heat. A single press cycles through temperature levels—blue indicates low, green medium, and red high. 4. When powered by a 3500 mAh power bank, approximate surface temperatures are: low (~42°C), medium (~48°C), and high (~55°C). The device automatically powers off after 2.5 hours of continuous use and can be reactivated manually. 5. Precisely crafted with clean, reinforced stitching, this scarf is ideal for outdoor activities including cycling, skiing, snowboarding, skating, mountaineering, climbing, and hiking. Weight: 0.09 kg Color: Black Material: 100% fleece Size: 26 x 14 cm Package Contents: 1 x Heated Scarf Note: Slight color variation may occur due to lighting conditions and screen settings. Measurement tolerance is ±1–3 cm.