The Portland bag is double lined with two layers of organic cotton canvas. The outer layer is finished with wax, making it durable and weatherproof. Portland features a large main compartment with a laptop sleeve, a smaller front zipper pocket, and twill straps and handle. Premium solid brass hardware with a nickel matte finish is used throughout the bag. All zippers are the highest quality YKK zippers you can find. The Portland Daypack is the perfect bag for a day in the city, hiking in the woods, or everything in between.