The heated vest for men guarantees a warm back at the push of a button. The integrated heating element is seamlessly connected to the lithium packs located under the chest ribs. The sleeveless vest is slim-fitting to ensure direct heat transfer. It is worn as a base layer. The breathable material is quick-drying and abrasion-resistant. In warmer temperatures, the vest can be worn without the lithium packs for sports, work, and leisure. It is compact and has a small packing size.