Prime Direct prime-direct Heated Vest Speed Heat. No noticeable stains. Works perfectly. Size: M Actual size: Body width approx. 45cm, Length approx. 54cm Accessories: Battery, charger Warm in just 15 seconds! Fast-heating vest "SPEED HEAT" Can't stand the cold... Worried about your health in the cold season... Just press the switch! Warm in just 15 seconds. Micro carbon fiber heaters installed in 3 places: 'neck', 'back', and 'lower back'. Warm your neck, back, and lower back with a single switch. Roll it up and put it in your bag, wear it in the evening, and turn it on when it gets cold to combat the cold! ■ It's very easy to use! Just two steps Step 1: Connect the battery to the power cord in the inner pocket. Step 2: Press the power button on the left chest. That's all! The micro carbon fiber in the neck, back, and lower back areas will generate heat and warm you up. 3-level temperature adjustment: Low, Medium, High → The color changes depending on the temperature. (High: Red 45 degrees Celsius, Medium: White 40 degrees Celsius, Low: Blue 35 degrees Celsius) Cordless / Washable Material: Outer: 100% nylon Lining: 100% polyester Filling: 100% polyester, Sides: 95% polyester, 5% polyurethane Prime Direct | prime-direct Women's Heated Vest Speed Heat With heating function