Features: 1.3 Heating Levels: Grey heated vest is a constant temperature vest, with three temperature levels to choose from: 45°C daily stable, warm, about 50°C moderate temperature, nursed back to health, 60°C cold to keep warm, hot but not hot. 2.Multi Purpose: USB electric heated vest can be used for hunting, skiing, fishing, motorcycle, camping, hiking, office, etc. It is an ideal choice in winter. 3.Simple Operation: Heated vest can be operated with one button. Press and hold the switch for 2 to 3 seconds gently to heat up quickly. Press the button briefly to adjust the three levels temperature at will. 4.USB Socket: Electric heated vest adopts portable and removable USB socket design, and the front and back are controlled by zones, so that you can adjust it at will. 5.Application Scenario: Electric heated vest is suitable for daily wear, winter travel, outdoor sports, outdoor work, outdoor play, etc. Specification Item Type: Electric Heated Vest Material: Neoprene, Carbon Fiber Color: Grey Applicable Scenarios: Daily Life of the Elderly, Winter Travel, Outdoor Sports, Outdoor Work, Daily Outing, Outdoor Play. Size: M: Chest: 96cm / 37.8in,Length: 60cm / 23.62in,Waist: 96cm / 37.8in,Shoulder: 37.5cm / 14.76in L: Chest: 100cm / 39.37in,Length: 62cm / 24.41in,Waist: 100cm / 39.37in,Shoulder: 39cm / 15.35in XL: Chest: 104cm / 40.94in,Length: 64cm / 25.2in,Waist: 104cm / 40.94in,Shoulder: 40.5cm / 15.94in 2XL: Chest: 108cm / 42.52in,Length: 66cm / 25.98in,Waist: 108cm / 42.52in,Shoulder: 42cm / 16.54in 3XL: Chest: 112cm / 44.09in,Length: 68cm / 26.77in,Waist: 112cm / 44.09in,Shoulder: 43.5cm / 17.13in 4XL: Chest: 116cm / 45.67in,Length: 70cm / 27.56in,Waist: 116cm / 45.67in,Shoulder: 45cm / 17.72in Package List: 1 x Electric Heated Vest