Item Type: 11 Areas Heated JacketMaterial: Polyester Fiber, Carbon Fiber, CottonPower Supply Mode: USB (Delivery Without Battery)Product Size: Approx.S: Back Middle Length 62cm / 24.4in, Shoulder Width 42cm / 16.5in, Chest Circumference 100cm / 39.4in, Hem 42cm / 16.5in, Sleeve Length 57.5cm / 22.6inM: Back Medium Length 64cm / 25.2in, Shoulder Width 43.3cm / 17.0in, Chest Circumference 104cm / 40.9in, Hem 44cm / 17.3in, Sleeve Length 59cm / 23.2inL: Back Middle Length 66cm / 26.0in, Shoulder Width 44.5cm / 17.5in, Chest Circumference 108cm / 42.5in, Hem 46cm / 18.1in, Sleeve Length 60.5cm / 23.8inXL: Back Medium Length 68cm / 26.8in, Shoulder Width 45.7cm / 18.0in, Chest Circumference 112cm / 44.1in, Hem 48cm / 18.9in, Sleeve Length 62cm / 24.4inXXL: Back Middle Length 70cm / 27.6in, Shoulder Width 46.9cm / 18.5in, Chest Circumference 116cm / 45.7in, Hem 50cm / 19.7in, Sleeve Length 63.5cm / 25.0inXXXL: Back Middle Length 72cm / 28.3in, Shoulder Width 48cm / 18.9in, Chest Circumference 120cm / 47.2in, Hem 52cm / 20.5in, Sleeve Length 65cm / 25.6inXXXXL: Back Medium Length 74cm / 29.1in, Shoulder Width 49.3cm / 19.4in, Chest Circumference 124cm / 48.8in, Hem 54cm / 21.3in, Sleeve Length 66.5cm / 26.2in 13 Heating Level: Built in carbon fiber heating element and 3 level heating level (25 to 45 ) can generate consistent heat for 11 core body parts, including neck, back, abdomen and waist, which helps keep the body warm, promote blood circulation, and relieve muscle pain and tension. 2Keep Warm and Resist Various Elements: Unique power supply from portable charger, 2A or 2.4A USB output. Insert 10000mAh battery pack (not included), and this polished heating vest can keep heat preservation for up to 7 hours at low level, 5 hours at medium level and 3 hours at high level. 3Comfortable Feeling and Delicate Look: With quilted, lightweight design and fine lining, you can enjoy unlimited comfort in autumn and winter. With a zipper on the front, you can fold this USB heated jacket on various tops to add a touch of fashion to the delicate look. 4Wash Method: In order to maintain the quality of the heated jacket and extend its service life, please wash it by hand or put it into the laundry bag for machine washing. Place the heated jacket in a well ventilated place to dry before next use. Do not bleach, iron or dry clean it. 5Applicable Scenes: 11 areas heated jacket is the best choice for winter. You can wear it to skate, ski, hunt, shovel earth, fish, hike and enjoy outdoor activities.