No price reduction. Will be shipped in an envelope. A long-sleeved shirt incorporating innovative technology that generates heat when you move your body in the cold. Using special functional yarns and fabric design, this material generates warmth when the garment stretches and contracts. It generates heat not only when the fabric is dry, but also when it gets wet. The heat generation effect is maintained even if the garment gets wet from sweat or rain, making it useful during winter sports. In addition, the heat generation effect weakens when the ambient temperature of the fabric reaches 25 degrees Celsius, preventing the inside of the clothing from becoming too hot. It also has excellent sweat-wicking and quick-drying properties, reducing chills from sweat. The highly stretchable material and unique three-dimensional design allow it to move flexibly with dynamic body movements. With UV protection (UPF50+, UV cut rate of 95% or more *data at 30% elongation) function, it can handle strong sunlight. The high-neck type, which also keeps the neck warm, is useful for winter golf, baseball, winter sports, trekking, and more.