These are The North Face Hot Trousers. When exposed to the cold, simply trying to keep warm with just your underwear isn't the right choice. Properly managing the sweat you produce is also an important issue, and comfort is only achieved by addressing both. This product can do both. This HOT series uses polypropylene, which doesn't absorb water, on the skin-facing side to prevent chills from sweat. The sweat is absorbed by polyester and evaporates. Then, the thick, brushed, and KODENSHI® Thermastat fabric generates ideal heat retention. Retail price: 7,480 yen They can be used for spring hiking and in winter.