This is a Patagonia Nano Puff Vest, a classic piece. The listed size is men's S, which is about a Japanese size M. The color is an exquisite yellow, though the exact name is unknown. It's easy to use as an accent color in your outfit. The insulation is PrimaLoft (synthetic fiber) instead of down, so it can be easily washed at home. It has been worn only a few times and is in excellent condition with little wear. How about taking this opportunity? Also recommended for those who like: The North Face mont-bell WILDTHINGS Columbia Karrimor Marmot ARC’TERYX and wander Snow Peak nanamica NANGA GRAMICCI LL Bean Eddie Bauer CHUMS