Madewell Brown Wool Alpaca Dillon Mockneck Pullover Sweater NC649 size XS. Good used condition! Made of soft and lofty yarn, this pullover sweater has a ribbed mockneck with a stitched V inspired by the triangle things found on classic sweatshirts. Cropped and cozy, it'll get just as much wear as your fleecy crewnecks. • Cropped fit. • Acrylic/polyamide/wool/alpaca/elastane.