Allbirds Men's XL Black Wool Sweater Jumper NWT. An elevated cool-weather layer crafted with premium natural materials, the Wool Jumper is dense, cozy, and built to be your go-to year after year. The Wool Jumper is made of 100% Merino wool. Classic Fit Long Sleeve Crew Neckline Natural Materials Double Knit Structure Thicker Gauge Yarn Expressive Stitching Pattern Approx measurements Pit to pit : 23” Length: 28.5” #15