Product: Micro Carbon Fiber Heater Built-in Warm Vest (Unisex) (Kumagai Denko Co., Ltd.) Model Number: SHV-02 Color: Black Size: S Experience unprecedented warmth! Leave winter cold protection to this. Heater built into the back of the neck! This irresistible warmth is something new. With W-installation of heaters on the "back of the neck" and "back muscles," it warms up to the waist, and the synergistic effect with far-infrared rays makes your whole body warm. The heater uses flexible, fibrous macro carbon fiber, so there is no discomfort when wearing it. Elastic fabric is used on both sides. Fits perfectly in various sizes! Battery-powered, cordless design with no extra wiring, making it very easy to handle. Uses reliable Samsung lithium-ion batteries! Achieves lightweight, compact, high-capacity, and stable power. The battery can be recharged and used repeatedly (usually about 500 charges), and one charge costs about 40 sen, making it very economical. Size: S: Shoulder Width: 41.5, Body Width: 50, Body Length: 62 (approx. cm) Body Weight: Approx. 270g Material: Outer/Lining: Nylon, Sides: Polyurethane/Polyester, Padding: Polyester Battery Dimensions: W39 x D70 x H21 (mm) *Excluding protrusions Accessories: Rechargeable battery (1), charging adapter (1), storage pouch [Regarding Shipping] Shipping is not available on Saturdays, Sundays, and holidays. Thank you for your understanding.