The Patagonia Flannel Shirt in Men's size M is a sustainable and organic cotton button-up perfect for hiking, camping, and other outdoor activities. Featuring a classic tartan plaid pattern, long sleeves, and a collared neckline, this shirt is designed for comfort and style in various occasions including casual wear and workwear. With a vintage look and retro accents like button closures, this shirt also boasts a nature-inspired theme perfect for the winter, fall, and spring seasons. The multicolor design adds a touch of personality to this versatile and machine washable piece from the reputable brand Patagonia.