Specifications: This product needs to be connected to a mobile power supply for heating, and it will automatically stop heating after unplugging. The mobile power supply needs to be purchased separately. It can be washed, and the power supply must be cut off when washing. Designed with five heating zones, three-level temperature control, intelligent heating, you can adjust suitable temperature. Made of waterproof and scratch-resistant fabric, it is wear-resistant and durable. It is suitable for daily wear in winter, outdoor camping, etc. Item Name: Heating Vest Gender: Unisex Material: Polar Fleece Power Supply: USB Style: Fashion Sleeve: Sleeveless Collar: Stand-up Collar, V-neck (Optional) Garment Care: Hand-wash, Machine-wash Season: Autumn, Winter Features: Smart Heating, Soft, Warm, Coldproof Size Details: [Our Size M] Bust: 92cm/36.2", Shoulder: 36cm/14.2", Length: 60cm/23.6" (Approx.) [Our Size L] Bust: 96cm/37.8", Shoulder: 36cm/14.2", Length: 61cm/24.0" (Approx.) [Our Size XL] Bust: 104cm/41.0", Shoulder: 40cm/15.8", Length: 62cm/24.4" (Approx.) [Our Size 2XL] Bust: 110cm/43.3", Shoulder: 42cm/16.5", Length: 64cm/25.2" (Approx.) [Our Size 3XL] Bust: 112cm/44.1", Shoulder: 44cm/17.3", Length: 66cm/26.0" (Approx.) Notes: Please refer to our size chart and choose the right size. Due to the light and screen setting difference, the color of the item may be slightly different from the pictures. Package Includes: 1 x Heating Vest (Others Not Included)