1. Heaters are built into the back of the neck and back, areas where humans easily feel the cold! Experience unprecedented warmth! 2. With heaters on both the "back of the neck" and "back muscles," you'll be warm all the way to your lower back, and the synergistic effect with far-infrared rays will keep your whole body toasty. 3. The heaters use flexible, fiber-like micro-carbon fiber, so there's no discomfort when putting it on or taking it off. 4. Useful for outdoor activities (work, watching sports, etc.). Perfect for accompanying children to their lessons, such as soccer, for long periods! 5. The outer fabric is water-repellent, so you're covered even in sudden weather changes. (Degrades with washing and friction due to post-processing.) 6. The lining is anti-static, reducing the unpleasant static cling when putting it on or taking it off. (Taffeta part is anti-static material, others are post-processed and degrade with washing and friction.) 7. Battery-powered, with a cordless design that eliminates unnecessary wiring, making it very easy to handle. 8. Uses a proven lithium-ion battery that has obtained PSE certification in Japan! Achieves lightweight, compact size, high capacity, and stable power. 9. The battery can be recharged and used repeatedly (usually about 500 times), and one charge costs only about 52 sen, making it very economical. 10. The "heat switch" placed on the chest lights up and allows for 3-level temperature adjustment: [Strong ●/Medium ●/Weak ●]. The color clearly indicates the temperature setting. 11. The switch flashes red when turned on. It immediately warms up at (strong) when starting. It automatically changes to (medium) after 5 minutes. Temperature can be changed while flashing. 12. Heating duration: Strong: approx. 3H / Medium: approx. 4.5H / Weak: approx. 7H, providing long-lasting warmth. 13. If it gets dirty, you can wash it by hand. (Please remove the battery.) 14. The high-capacity, small lithium-ion battery has a low voltage of 7.4V, so it's safe with no risk of electric shock. 15. The battery charging time is short (about 2.5 hours for a full charge), and you can also top it up. 16. The dedicated charging adapter has an LED indicator that shows the charging status at a glance (charging: red ● / fully charged: green ●) 17. The dedicated charging adapter supports 100V-240V, making it globally compatible. You can rest assured even on business trips to cold regions. (Adapter required) 18. Of course, you can also use it as a regular bench coat when the heater is off. ■Size Shoulder Width / Body Width / Length / Sleeve Length LL Size Approx. 57cm / Approx. 65cm / Approx. 114cm / Approx. 65cm