Winter pants from The North Face. Size L. Used twice for climbing Mt. Fuji. There are a few scratches on the edge guards from that use. This is a sample product, so the model number is unknown, but it's Futurelight. There may be differences from commercially available products, but the details are unknown. I didn't feel any lack of performance even when combined with a dry layer on Mt. Fuji in winter, so I think it will be fine anywhere in Japan.