Hi! This is an authentic Arc'teryx Cerium LT Vest.
Men's XL, 2020 release.
Color is "Labrinyth". It appears lighter or darker depending on light source, which is usual with this kind of nylon fabric, but first and second photo probably represents the the usual hue in daylight. The Cerium LT line is insulated primarily with down and synthetic insulation in shoulder are which prone to moisture.
Features include an internal pocket, with a loop inside it to attach/detach the included stuff sack. There is one waistline pull cord. See Arc'teryx website for full details.
I'm the original owner. I removed tag intenting to wear it last Fall but it remained in my closet. It's never been worn or cleaned. I've inspected every inch of stitching and there are no flaws. It's 100% the same as a new vest with Arc' tag.
Shipping price is for USPS Priority shipping within the contential US.