New, unused item *The box has been opened for photography purposes. Reference price: 4,485 yen Color: Navy Size: LL Material composition: HeiQ SmartTemp processed material, a temperature-regulating technology from Switzerland Washing instructions: Machine washable [Swiss-developed HeiQ Smart Temp temperature-regulating technology] These men's pajamas feature the latest temperature-regulating technology processed into the fibers. This technology works according to the wearer's skin temperature, releasing heat when it's hot and retaining warmth when it's cold, preventing sleep disturbances caused by temperature fluctuations during the night and leading to deep sleep. It enables "automatic response to temperature changes," which was difficult with conventional loungewear, and supports restful sleep by reducing factors that interfere with sleep. These are next-generation sleepwear (men's pajamas) that provide a consistently comfortable sleep environment in all seasons, spring, summer, autumn, and winter. [All-season design resistant to temperature differences] These temperature-regulating loungewear can be worn comfortably not only in the spring and autumn, when temperature differences are significant, but also in the sweltering summer and the cold winter. It can be worn as a single layer regardless of the season, reducing middle-of-the-night awakenings such as "waking up because it's hot" or "recovering with a blanket because it's cold," and protecting the quality of sleep. [Comfortable feel and sweat-wicking and quick-drying properties with a cotton blend material] These men's pajamas are made of a skin-friendly and soft cotton blend, combining a comfortable feel with ease of handling. They also have excellent sweat-wicking and quick-drying properties, quickly absorbing and dispersing sweat, so you won't feel sticky or stuffy even during sleep, and a refreshing comfort lasts. Furthermore, they are breathable and do not easily get stuffy even with prolonged wear, making them cool in the summer and comfortable even when layered in the winter. The processing and material work together to lead to restful sleep. In addition, they have stretchability, so they naturally fit the body's movements, such as turning over and changing posture, and are stress-free men's pajamas that allow you to spend your time relaxing and sleeping without stress. [Unisex simple design & front button specification] These loungewear are made in men's sizes, but they feature a simple and sophisticated design that women can also wear. They are unisex loungewear that is easy to choose for couples or as a gift. The classic front-buttoned top is easy to put on and take off, making it practical for adjusting body temperature. The elegant silhouette that doesn't feel out of place as loungewear is suitable not only for sleeping but also for relaxing and working from home.