White Mountaineering Burgundy Sweater 0/XS
Sold out on Ssense before it dropped to 50% off (I e-mailed them so was able to get one at 50% off that had been returned). Looking for the same price that I got it for: $302.
Measurements (from Ssense):
Sleeve Length: 64cm
High res images (from Ssense and Tres Bien):