Vtg Pendleton Flannel Shirt Jacket Mens Medium Blue Plaid Virgin Wool Button Up This vintage Pendleton flannel shirt jacket in men's size Medium features a classic blue plaid pattern crafted from premium virgin wool for exceptional warmth and durability. Designed with a button-up front and timeless styling, it's perfect for layering during cooler weather, outdoor adventures, or everyday casual wear. Pre-owned and in good condition; please see photos for details and measurements.