mont-bell (Montbell) Light Alpine Down Pants Men's Size: M Color: DKNV (Dark Navy) These are Light Alpine down pants from mont-bell, a Japanese outdoor brand. A stuff sack is also included. I used these once outdoors after purchase, and have stored them after maintenance. These are a 18,500 yen item, but I'm offering them for 10,500 yen (including shipping). Thank you. Below is information from the manufacturer's website. These warm pants with a high down content are perfect for wearing in tents or mountain huts during cold seasons. The seat and knees, which are prone to stress from friction, are reinforced with double-layered fabric, allowing them to be used as outerwear. [Materials] Outer: 20-denier Ballistic® nylon ripstop [water-repellent finish, anti-static treatment] (Seat, below the knees) 40-denier full dull nylon taffeta Lining: 20-denier Ballistic® nylon taffeta [anti-static treatment] Insulation: 800 fill power EX Down [Average Weight] 316g [Features] Downproof treatment / Front zipper (for men) / Thum-loop system / Zippered pockets (2 on the waist) / With stuff sack