MSPEC Men's Momohiki Thermal Long Pants is a men's underwear developed by Japanese underwear designer Yasutada Miura to solve his own problems of itching and dermatitis caused by sweat. Both sides of the front body fit closely to the body and act as a partition, so the skin does not come into contact with each other, reducing stuffiness and itching. The front body is large-capacity, so it wraps around you loosely without feeling oppressive. Compared to flat underwear, it is more stable in position, has a sense of freedom, and has excellent breathability.