The primary feature of the Alpha Heat Vest is its built-in heating technology. This involves rechargeable lithium-ion batteries that power heat zones within the vest. The more advanced the heating system, the higher the cost of the vest. Some models may offer additional heating zones or longer battery life, which can increase the price. https://www.offerplox.com/e-commerce/alpha-he... https://www.offerplox.com/e-commerce/alpha-heat-vest/