The Patagonia Tres Pack 25L Backpack is a versatile messenger bag that functions as a backpack in three different ways: as a standard backpack, a crossbody bag, and a vertical shoulder bag. Made with durable nylon material, this gray backpack is designed for unisex adults and features the signature Patagonia Tres model. With a compact 25L capacity, this backpack is ideal for carrying essentials while on the go, offering both style and functionality for everyday use.