Item No. #1101626 I purchased this from the official website about two years ago. https://webshop.montbell.jp/goods/disp.php?product_id=1101626 I wore it three or four times and then stopped using it, storing it in my closet. I didn't see any noticeable stains at a glance. The following is quoted from the website: --- Product Information This is a lightweight and soft-to-the-touch down jacket made with "Windstopper® Fabrics," a material with high windproof and waterproof-breathable properties, and filled with high-quality down. *It is not completely waterproof. Because seam tape processing is not applied, water may penetrate from the seams. Specifications [Material] Outer: Windstopper® Fabrics by GORE-TEX Labs [Surface: 13-denier Ballistic Airlight® nylon ripstop] Lining: 10-denier Ballistic Airlight® nylon ripstop [Water-repellent finish, anti-static treatment] Insulation: 800 fill power EX Down [Average Weight] 323g [Colors] Black (BK), Blue (BLRI), Wine Red (BNBR) [Sizes] S, M, L, XL [Features] 4 pockets (2 with zippers〈waist〉, 2 without zippers〈inside〉) / Downproof treatment / Single quilt construction / Stuff sack included / Aqua-tect® zipper / Zipper does not touch the chin / Alpine cuff / Lead-in cord system [Storage Size] Φ14 x 17cm Stains, tears, odors, etc... None