Specifications: 1 Minutes fast heat the jacket dispels cold and keeps you warm. It can be washed by machine and can be washed by hand. Do not wring it by hand. The fashion coat is warm comfortable and breathable and its a good partner for your winter going out. The vest is heated by USB and needs a 2A power bank (Not Included). Item Name: Vest Material: Self-heating Cotton Fabric Elastic Cloth Crystal Super Soft Fabric Size Type: Regular Gender: Men Style: Stylish Features: Durable Warm Keeping Zip Closure Size Details [Our Size M] Shoulder: 38cm/14.96 Sleeve: 10cm/3.94 Length: 60cm/23.62 (Approx.) [Our Size L] Shoulder: 40cm/15.75 Sleeve: 10cm/3.94 Length: 61cm/24.02 (Approx.) [Our Size XL] Shoulder: 42cm/16.54 Sleeve: 10cm/3.94 Length: 63cm/24.8 (Approx.) [Our Size XXL] Shoulder: 44cm/17.32 Sleeve: 10cm/3.94 Length: 65cm/25.59 (Approx.) [Our Size XXXL] Shoulder: 46cm/18.11 Sleeve: 10cm/3.94 Length: 68cm/26.77 (Approx.) Notes: Please refer to our size chart and choose the right size. Due to the light and screen setting difference the items color may be slightly different from the pictures. Package Includes: 1 x Vest