About this product SMART HEATING: The qualified carbon fiber heating element of the heating vest has 3 heating levels, which can generate consistent heat for your 4 core body parts such as neck, back, abdomen and waist, helping to keep the body warm and promote blood circulation. The women's heated vest features a smart dual-switch design. The "BACK" button can control the heating of 7 areas on the back (neck, left and right shoulders, left and right back, and left and right waist). The "BELLY" button can control the heating of 2 areas on the left and right abdomen. FAST AND LONG-LASTING WARMTH: Heats up quickly in seconds with a 3.7V cUL/UL certified battery. Equipped with a powerful 10000mAh power supply and a portable battery pack, it is simple and convenient to use. Portable batteries can also be used as power sources for cell phones or other devices. After being fully charged, it can be comfortably warm for up to 8 hours (3 temperature settings correspond to different use times, 4h-6h-8h), which can keep you warm all day long. WATERPROOF AND LIGHTWEIGHT: The TAMEYA Women's Heated Vest is made from a water-resistant and windproof fabric. Lightweight, slim-fit design with interior pocket for safe and secure storage of your power bank. Regular fit, lightweight and stylish women's tank top with a fully lined interior designed to keep you warm and comfortable. Stand collar, 2 side zip pockets, front zip closure, shaped waist at back, sleeveless quilted tank top. PERFECT FOR ALL OCCASIONS: Our heated vests are perfect for your daily commute, walking your dog in the cool fall air, tailgating for your favorite football team, wearing under a winter jacket, or even in the office when it's too cold. Soft and smooth fabric, lightweight, a wardrobe essential. The fabric is not heavy, but very warm. In the cold winter, warmth is the best expression of love! We guarantee these are the most comfortable women's heated vests you'll ever own. Choose your size: M. Please carefully check the size chart in the pictures (last picture). Do not use Amazon sizes. Various colors available. If there are any problems with your purchase, please feel free to contact us and we will help solve the problem, we are happy to provide you with a wonderful shopping experience.