Intelligent heated vest made for warmth keeping without wearing bulky clothes under cold conditions. It provides body warming and blood circulation, perfect for climbing, hunting, skiing, motorcycling, camping, snowmobiling, fishing, hiking, etc. A great choice for elderly and a perfect gift for friends.    Features:  Made from fine fabric, comfortable and warm to wear.  Zipper fastening to front and side pockets.  Solid color all over design.  V neck and sleeveless.  It has been cut with a slim fit.    Instructions for use:   1. Vest features built-in USB port to connect the power bank.  2. Power switch - long press the switch for 3 to 5 seconds.  3. Red light flashes - automatic heating  4. Red light - manual heating, high temperature  5. White light - medium temperature  6. Blue light - low temperature    Note: The power bank is not included.    Specifications:  Size: M (US4 UK/AU8 EU34) / L (US6 UK/AU10 EU36) / XL (US8 UK/AU12 EU38) / 2XL (US10 UK/AU14 EU40) / 3XL (US12 UK/AU16 EU42)  / 4XL (US14 UK/AU18 EU44)  / 5XL (US16 UK/AU20 EU46) (optional)  Color: Black  Material: Polyester  Neckline: V-Neck  Sleeve Length: Sleeveless  Waistline: Natural  Clothing Length: Regular  Pattern Type: Solid  Style: Fashion  Weight: Approx. 275-389g / 9.7-13.4oz    Size Details:               Asian Size     M     L     XL     2XL     3XL     4XL     5XL             EUR     34     36     38     40     42     44     46             US,CA     4     6     8     10     12     14     16             UK,AU     8     10     12     14     16     18     20             RUS     44     46     48     50     52     54     56             Clothes measurements in cm/inches             Bust     94cm     37.0''     98cm     38.6''     102cm     40.2''     106cm     41.7''     110cm     43.3''     114cm     44.9''     118cm     46.5''             Clothing length     57cm     22.4''     59cm     23.2''     61cm     24.0''     63cm     24.8''     65cm     25.6''     67cm     26.4''     69cm     27.2''                     How to Measure:      Note:  This clothing size information is just for reference only, please check the above detailed measurement to choose the correct size, and allow 1-2cm (0.4-0.8") differences due to manual measurement, thanks.  Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.    Package List:  1 * Heated Vest