The Cabin Rib Zip Lambswool Sweater in Black from Knickerbocker, NYC. 

Details
The Cabin Rib Zip Lambswool Sweater is knit from a dense lambswool yarn in a heavy rib structure. The weight and construction provide substantial warmth, making it well suited for the cold as a top or mid-layer. A high collar and full two-way zip front allow for adjustable coverage. The overall shape remains straightforward and functional, sitting just below the belt line for a comfortable fit.

• 100% extra-fine virgin wool yarn, produced in Italy. Woolmark certified.
• Two-way custom-developed YKK Knickerbocker zipper
• Leather zipper puller
• Made in Portugal