Specifications: This vest has a built-in heating module intelligent heating and three-speed temperature control. The power interface uses insulation and waterproof treatment easy to wash and the support is washable. It can be powered by a mobile power bank which is very convenient. Compared with other vests it can be machine washed or hand washed. Type: Vest Size Type: Regular Material: Polyester Style: Fashion Sleeve: Sleeveless Garment Care: Hand-wash Machine-wash Power: USB Features: Electric Heating 3 Level Control Warm Thicken Waterproof Size Details: [Our Size S] Bust: 50cm/19.7 Shoulder: 40.3cm/15.9 Length: 63cm/24.8 (Approx.) [Our Size M] Bust: 52cm/20.5 Shoulder: 41.5cm/16.4 Length: 65cm/25.6 (Approx.) [Our Size L] Bust: 54cm/21.3 Shoulder: 42.7cm/16.8 Length: 67cm/26.4 (Approx.) [Our Size XL] Bust: 56cm/22.1 Shoulder: 43.9cm/17.3 Length: 69cm/27.2 (Approx.) [Our Size 2XL] Bust: 58cm/22.9 Shoulder: 45.1cm/17.8 Length: 71cm/28.0 (Approx.) [Our Size 3XL] Bust: 60cm/23.6 Shoulder: 46.3cm/18.2 Length: 73cm/28.6 (Approx.) [Our Size 4XL] Bust: 62cm/24.4 Shoulder: 47.3cm/18.7 Length: 75cm/29.6 (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 Vest